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OpenStudy (anonymous):
Help!!!! Simplify 4|cos θ| if θ = sin−1 (x/4) for some real number x. isn't the answer √16-x^2???
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OpenStudy (paxpolaris):
|dw:1414388213899:dw| the answer is\[\sqrt{16-x^2}\]... as long as \(-4\le x\le 4\)
OpenStudy (paxpolaris):
you are right
OpenStudy (anonymous):
it doesn't say the range..
OpenStudy (anonymous):
you are sooooooo awesome!!!
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