I can't figure this question, please help me.
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Hint: What possible values can arcsin have? Also what sin(-x) in terms of sin(x) and what is sin(pi+x) in terms of sin(x)?
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Originally Posted by bluffy ans:
-1.25663706 rad I can't help but think this was intended as a joke. Either that or "bluffy" has no clue what the problem is and is just "bluffing"!
For starters, SURELY you know that sine and arcsine are inverse functions, and so cancel each other out...
So far I got I got that the -3pi/5 falls on QIII, and that my reference angle (theta hat)= 2pi/5. So the answers is -2pi/5.... is this right!
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