I was tryin to do some some simple interest on my calculator and when I was computing the days between daates using the 2nd and 1 function ... I put in the first date pressed enter and "error 6" pops up what is the problem?

Fixed deposit calculations can be done by both manual and automatic methods.Now let us figure out the fd calculation in both ways:
1.) Manual Calculation Technique: It is the conventional process to know your Fixed deposit interest calculation. The formula for manual fd calculation is used as below:

Where,A = Final Amount
P = Principal Amount (initial investment)
r = Annual Nominal Interest Rate (as a decimal, not in percentage)
n = Number of times the interest is compounded per year
t = Number of years

2.) Online Calculator Technique: Nowadays online FD calculator is very amazing technique and it is a very useful online tool that helps you to easily calculate your Fixed deposit return. Online FD calculators uses simple technique in which you need to put your amount, tenure, interest rate and can get accurate results instantly. You can easily calculate and compare the interest receivable by changing the deposit amount.

premium X % X time
so 380,00000 X4/100 X 1 year
it calculated as the amount ( premium ) multiplied by the percentage of 100 multiplied by the period in years or parts of a year
so it can be 100 X 25% or 1/4(25/100) by the period (5 years or daily (1/365 of a year)
This is known as simple interest
compound interest is calculated on remaining premium after payment X the interest rate by the day or week or month
so for example 100 X 4/100 X 1/12 is the first calculation for the month and for the next month the calculation will be premium of 80 ( if a 20 payment was made in the month X 4/100 X 1/12 and so on if payment are made on time
pm the other hand if no payment are made then the premium goes up by the interest rate
so for the next month it is 104 X 4/100 X 1/12 and the month after that 108.16 X 4/100 X 1/12.and so on
banks use compound when calculating home loan repayments and simple interest when paying interest on your deposits
( has to be in the bank for 367 days to get the interest paid )

Hi there,

First make sure all previous amounts stored are cleared by pressing 2nd F MODE.
Then type in the original value 20 000 and press PV.
Type in the interest 13 and press I/Y.
(If i assume that the interest is compounded yearly my calculation is more simple)
press 5 and N
Press COMP FV and your answer will be - 36 848.70

(If I assume that the interest is compounded monthly, i need to input a little bit more data into my calculator)
Press 2nd F I/Y (to get to payments per year) and press 12 and ENT. Press ON.
Then press 5 and 2nd F N and then press N again.
Now calculate FV by pressing COMP FV which should give you - 38 177.13.

Take this value and subtract the PV from it to get the amount of interest earned.

I assume you want 40 raised to the one-third power?
Three simple ways.
Raise 40 to the one-third power: Press 4 0 y^x ( 1 / 3 ) =
or
Take the cube root of 40: Press 4 0 2nd cube-root = (the cube-root is the shifted function of the 0 key)
or
Take the third root of 40: Press 4 0 2nd xth-root 3 = (the xth-root is the shifted function of the y^x key, located just above the divide key)

Your result is for the 6.75% interest compounded monthly. The problem states that the interest is compounded semiannually. This makes a difference in the effective interest rate.

A 6.75% APR compounded semiannually gives an effective interest rate of about 6.864%:
Press 2 , 6 . 7 5 2nd >EFF

Converting this to APR gives about 6.657%:
Press 1 2 , 6 . 8 6 4 2nd >APR

If you use 6.657 for the interest rate instead of 6.75 you should get the correct result.

Once the graph is drawn you can use the Calculate menu to find

• 1:value, the value of the function at a point
• 2:Zero, the coordinate of a point where the function vanishes (has value zero)
• 3:minimum, the location of a point where the function has a minimum
• 4:maximum
  
• 5:intersect , the value of the function when it crosses the y-axis (y-intercept)
• 6:dy/dx, the value of the derivative of the function at a point.
• 7: Integral (f(x),dx)

For most of the foregoing calculations, you need to supply the interval of x-values that is of interest to you.To move the cursor along the curve to set the left limit and right limit of the interval of interest, use the LeftArrow and RightArrow keys.

You cannot find the location of an inflexion point as this requires the knowledge of the 2nd derivative of the function, and this calculator calculates the first derivative only. However, there may be 3rd-party programs that handle this, on ticalc.org website. Use at your own risk and under your sole responsibility.

To access the seven menu options above, you press [2nd][TRACE] to open the (CALC) menu. Use the Down and Up Arrows to move cursor along the menu options.

If the interest is compounded monthly:

2nd [CLR TVM] (clear any existing results)
1 5 0 0 0 _/- PV (present value, negative because you're paying it out)
6 I/Y (annual interest rate)
25 2nd [*P/Y] N (25 years)
CPT FV (compute future value, see 66,974.55)

If the interest is compounded annually:

2nd [CLR TVM] (clear any existing results)
1 5 0 0 0 _/- PV (present value, negative because you're paying it out)
6 I/Y (annual interest rate)
2nd [P/Y] 1 ENTER 2nd [QUIT] (one compounding period per year)
25 N (25 years)
CPT FV (compute future value, see 64,378.96)

2nd [CLR TVM] (clear old data)
6 2 5 PV (present value)
8 I/Y (annual interest)
1 2 8 4 +/- FV (future value)
CPT N / 1 2 = (compute number of months, divide by 12 to get number of years)

Hello,
There are no dedicated keys for these trigonometric functions, for the simple reason that they can be obtained from the tan, sin, and cos by a simple division.
cotangent (x) =1/tan(x) . Do not confuse with the arc tangent tan^(-1)
cosecant (x) = 1/sin(x) . Do not confuse with the arcsine sin^(-1)
secant(x) =1/cos(x) Do not confuse with the arccosine cos^(-10)

If you know how to use the tan, cos, and sin, with angle unit in degrees or radians, then there will not be any problem

If angle unit is degree, any number you give a trigonometric function is interpreted as degree. For instance if mode is in degree , and you calculate cos(PI) do not expect the value -1. You will have the value corresponding to the cosine of of 3.14159 degrees, namely 0.99849715

Now for you if you are interested.
If [MODE] is in degrees you can still enter angles in radians
You use the [2nd][ANGLE] [3: raised r] [ENTeR].
Here is a screen capture to show you more clearly.


The raised r is obtained by [2nd][ANGLE][3: raised r] [ENTER]

Hope it helps.

Are you putting 30x12=360 for N? Since you have monthly payments, you have to compute it a little different. Also, you have to find the effective monthly interest rate. 1.0575^(1/12) = .4669839%.

Another way is to enter 30 for N and 5.57 for I/Y, and change P/Y to 12.

Hope this helps!