Posted by **Linds** on Wednesday, October 25, 2006 at 9:45pm.

calculus help needed

example: sin-1(-1/2)

how do you figure this out?

The sin^-1 means the arcSin, or the angle whose sine is ...

so sin^-1(1/2) is the angle whose sine is -.5, which is -30 degrees.

In your calculator, put in -.5, then press INV sin.

so as my answer do i put pi/6?

That is the answer in radians. It should be negative. There is an angle in the third quadrant that yields a sine of -1/2 also.

## Answer this Question

## Related Questions

- math - Can anyone help w/ these. 1) Solve the equation in the internal [0deg, ...
- Math - If y = sin−1 x, then sin y = x,−π/2 ≤ y ≤ &#...
- math - Eliminate the parameter (What does that mean?) and write a rectangular ...
- trig - Reduce the following to the sine or cosine of one angle: (i) sin145*cos75...
- MATH - 1.)Find the exact solution algebriacally, if possible: (PLEASE SHOW ALL ...
- Inverse trigonometric function - How to solve without calculator 1. sin(arctan(...
- Math - A triangle has an angle whose sine is equal to 1/2. The angle is larger ...
- maths - Choose the two options which are true for all values of x 1) cos (x) = ...
- physics - The width of the doorway is 83 cm, and the speed of sound is 343 m/s. ...
- Math sin/cos - On a piece of paper draw and label a right triangle using the ...