Which double-angle or half-angle identity would you use to verify the following:cscxsecx=2csc2x a) cos2x=1-sin^2x b)sin2x=2sinxcosx c)tan2x=(2tanx)/(1-tan^2x) d)cos2x=2cos^2x-1

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asked Jan 28, 2019 159k views

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Which double-angle or half-angle identity would you use to verify the following:cscxsecx=2csc2x

a) cos2x=1-sin^2x
b)sin2x=2sinxcosx
c)tan2x=(2tanx)/(1-tan^2x)
d)cos2x=2cos^2x-1

Mathematics
high-school

YSN asked

by YSN

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Usman Shahid answered Jan 29, 2019

by Usman Shahid

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2 votes

Answer:

OPTION B.

Explanation:

Chethaka Uduwarage answered Jan 31, 2019

by Chethaka Uduwarage

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