Posted by **Anonymous** on Sunday, November 8, 2009 at 9:42pm.

How do I find the "exact value" for the arcsin of -pi/3 radians?

- trig -
**bobpursley**, Sunday, November 8, 2009 at 9:46pm
I hope you mean sine of -PI/3. ARCsin makes no sense, because you already have the angle.

PI radians is 180 deg, so PI/3 must be 60 deg. Now notice it is negative (300deg).

I assume you long ago memorized the 30-60-90 triangle functions.

- trig -
**Anonymous**, Sunday, November 8, 2009 at 9:47pm
That's weird, my paper clearly says arcsin of -pi/3 radians. So should I just say this isn't possible..or would -pi/3 still be the answer? or would i write -(sqrt 3)/2?

## Answer this Question

## Related Questions

- Trig - how do i find the exact value of s [pie/2, pie] sin s = radical2/ whole ...
- Math - Find the exact value of sin(A+B) when angle A is arcsin(8/17) and angle B...
- trig - Find the exact values of the inverse function arcsin 1/2
- trig - I need help on these problems: Find the exact value of tan(23pi/6) also, ...
- trig - please help me with some questions I skipped on a review for our test ...
- Math - Find the Exact Value of the Composition cos(arcsin(1/4))
- trig/pre -calc - hello, i don't quite understand how to do this type of problem...
- calculus - How do you find: the Integral of arcsin(1 / (sqrt x^2 - 1) ) dx ?? (...
- math - Eliminate the parameter (What does that mean?) and write a rectangular ...
- math - How do you find (in radians) the exact value of: tan[pi-(pi/12)]