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There is a key on the left column of keys, below the MATH key and above the x^2 key. It is marked with an x raised to power of -1. It computes the reciprocal of the number displayed.
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TWO THINGS YOU NEED TO KNOW, Eli.1. Secant will NEVER return a degree measure (or even a radian measure) no matter what computer or calculator you use. The reason is because secant returns the ratio of sides (hypotenuse over adjacent), which has a range of and find its reciprocal (ie, flip the number upside down: the reciprocal of 5 is one-fifth). That's all.B. TI-84 only uses the three basic trig functions. Secant is the reciprocal of cosine. Therefore, in order to find the secant of -1.2 radians you need to be in Radian mode (see #2 above). From there, you just find the cosine of -1.2 and take that values reciprocal (ie, flip the number upside down: the reciprocal of 10 is point one) . That's all. Math lesson: 1 Radian = 180 Degrees. Therefore, 1.2 Radians is roughly one-third of pi, therefore it is roughly one-third of 180 degrees; therefore -1.2 radians would be nearly -60 degrees (a very friendly angle measure). I hope that helps If not, you should call Texas Instruments because they've got friendly people who are happy to assist anyone. Questions like this are right up their ally, advanced questions like the syntax of the poisson cumulative distribution function are not. So, you're fine. For in depth math help holler at www.THEMATHCHEETAH.comIn Short: Secant returns ratios and NOT degrees or radians. Secant is the reciprocal to cosine. Arcsecant WILL return degrees/radians. Your calculator can be set to either mode.TEXAS INSTRUMENTS >>>>> all calculators ever made.
there is a button on which x(-1) is written,this button is found to the left of the "sin" button.this acts as inverse. for e.g- if you want the inverse of 5, press 5 and then click on that button.
It is the key labeled [X to -1] or [X^-1], the one below [MATH] and above [X^2]. This key is just to calculate the reciprocal of a displayed result. It does not calculate the inverse in the context of functions. Alternatively, if you have not already entered the number or the expression, you can start by entering 1 [/] then the number then [ENTER].
cosecant of X =1/sin(X), must not be confused with arc sine [sin^-1]
secant of X =1/cos(X), must not be confused with arc cosine [cos^-1]
cotangent of X =1/tan(X), must not be confused with arc tangent [tan^-1]
Because of these simple relations, calculator makers do not implement them with specific key sequences. On this calculator, you have two ways to calculate one of these functions. EX cosecant of 37 degrees
You enter 1 / [sin] 37 [ ) ] [ENTER] result is 1.661640141
You enter [sin] [ ) ] 37 [ENTER] followed by [X^-1] to take the reciprocal of the previous answer. The [X^-1] key is the one just below [MATH].
A word of caution: secant cosecant and cotangent must not be confused with the inverse trigonometric functions arcsin, arccos, arctan
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