My casio fx-es is not working - Casio FX82ES Scientific Calculator

SOURCE: Casio FX-115 ES: SIN,COS,TAN (answer isnt correct)

Hello,
It may be due to the angle unit used. You can have angles in degrees, in radians, and in grads. You should set the default angle unit to waht you problem calls for.
To set degree as default SHIFT MODE 3
To set radians as default SHIFT MODE 4
To set grads as default SHIFT MODE 5

The values of angles calculated by the inverse trigonometric functions are in the default unit that is set . This may be the source of the wrong answers that you get.

Hope it helps.

Testimonial: "thanks alot!! "

SOURCE: how do i do a matrix problem in my casio fx 115

http://support.casio.com will allow you to download a manual

SOURCE: How do you switch between degree and radian mode

Press SHIFT MODE to access (SETUP)
Press 3:deg for degree OR
press 4:Rad for radian.

SOURCE: how do i get my

The calculator doesn't have those functions built-in. Use the relationships sec(x) = 1/cos(x), csc(x) = 1/sin(x), and cot(x) = 1/tan(x).

SOURCE: Where is my Degree Minutes

It's just above the ENG key, to the left of the hyp key, on the second column from the left.