SOLUTION: How do I prove that
1-2cos^2x = sinxcosx(tanx-cotx)
What do I do to the right side?
I know that I should right tanx a sinx/cosx and cotx as 1/(sinx/cosx), but I don't know
Algebra.Com
Question 919191: How do I prove that
1-2cos^2x = sinxcosx(tanx-cotx)
What do I do to the right side?
I know that I should right tanx a sinx/cosx and cotx as 1/(sinx/cosx), but I don't know what to do with that.
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!
sinxcosx(tanx-cotx)
( cosx/sinx)(sinxcosx)(tan^2x - 1)
cos^2 (tan^2x - 1)
sin^2 - cos^2
(1 - cosx^2) - cosx^2
1 - 2cosx^2
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