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OpenStudy (anonymous):
Verify each trigonometric equation by substituting identities to match the right hand side of the equation to the left hand side of the equation.(sin x)(tan x cos x - cot x cos x) = 1 - 2 cos2x
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OpenStudy (anonymous):
This identity is false :p Try it with x=30º, in the left side gives -1/2 and in the right one 0.
OpenStudy (anonymous):
you mean plug 30 for x?
OpenStudy (anonymous):
i'm just very confused sorry
OpenStudy (anonymous):
Yes. Maybe you typed wrong :p
OpenStudy (anonymous):
(sinx)(tanxcosx-cotxcosx)=1-2cos^2x its from my textbook
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