Question 1162182: Find sin(2x), cos(2x), and tan(2x) from the given information.
sec(x) = 6, x in Quadrant IV
Answer by Alan3354(69443)   (Show Source):
You can put this solution on YOUR website! Similar problem.
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---------------------------------------Find sin(2x), cos(2x), and tan(2x) from the given information.
cot(x) = 2/3, x in Quadrant I
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cot(x) = 2/3
tan(x) = 3/2
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tan = y/x
r+=+sqrt%28x%5E2+%2B+y%5E2%29+=+sqrt%2813%29
==========================
sin(x) = y/r
cos(x) = x/r
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sin(2x) = 2*sin(x)*cos(x)
cos(2x) = sqrt(1 - sin^2(x))
tan(2x) = sin(2x)/cos(2x)
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If you just get the answer and don't understand, things will get a LOT worse soon.
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