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OpenStudy (anonymous):
Prove 2siny cosy sec2y= tan2y
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OpenStudy (anonymous):
does it say prove?
OpenStudy (ranga):
2sin(y) cos(y) sec(2y) = 2sin(y) cos(y) / cos(2y) = sin(2y) / cos(2y) = tan(2y) Note: The double angle formula for sine is: sin(2A) = 2sin(A)cos(A)
OpenStudy (anonymous):
Thank you ranga
OpenStudy (ranga):
you are welcome.
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