## anonymous 5 years ago Find the exact value of arcsin(-1) without using a calculator. A. 2pi/3 B. - pi/3 C. 0 D. - pi/2 E. - pi/6

1. anonymous

-pi/2 since $sin(-\frac{\pi}{2})=-1$

2. anonymous

Again, a special trig value. sin(-pi/2) = -1 since sin is negative in the third and fourth quadrants only.