Question 991092: find cos of theata if csc of theata is -2 and cos of theata >0
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! find cos(t) if csc(t) = -2 and cos(t) > 0
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Note: If csc is negative and cos is positive, the angle in in QIV
where x is positive and y is negative.
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Since csc = r/y = -2, r = 2 and y = -1
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Then x = sqrt(2^2-1^2] = sqrt(3)
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Ans: cos(t) = x/r = sqrt(3)/2
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Cheers,
Stan H.
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