I think you mean the concept of inverse trig functions.
Let's just look at one, the inverse cosine function.
cos-1 (x) also called arccos(x) is the inverse of cos(x).
cos-1 (x) <=> x=cos (theta)
So to evaluate an inverse trig function we are ask what angle, theta, did we plug into the trig function (regular, not inverse function) to get x.
So here is one more example.
tan-1 (x) means x=cos (theta)
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Secant is a trignometric function. In a right triangle, the secant of an angle is the hypotenuse over the adjacent side. It is also the inverse of cosine. For example secant(x) = 1/cos(x)
find x. given is 14 and a 90 degree angle
* *It is the reverse of the actionEx.Addition is the inverse of subtrationmultiplication is the inverse of division
Addition is the inverse operation of subtraction and multiplication is the inverse operation of division. The word inverse means "opposite".
A number and its additive inverse add up to zero. If a number has no sign, add a "-" in front of it to get its additive inverse. The additive inverse of 5 is -5. The additive inverse of x is -x. If a number has a minus sign, take it away to get its additive inverse. The additive inverse of -10 is 10. The additive inverse of -y is y.