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(secx + tanx) (1-sinx) = cosx
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Alysha004

by Alysha004 at March 25, 2010

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secx-(sinx/cosx)+ tanx- (tanx x sinx)= cosxsecx-tanx+tanx- (tanx x sinx)=cosx1/cosx- (sinx/cosx x sinx/1)=cosx(1-sinx^2)/cosx=cosxcosx^2/cosx=cosxcosx=cosx
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gibby. gibby. March 25, 2010

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When playing with trig identities, it is always best to change the given functions to sine and cosine. mathland
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mathguy mathguy March 26, 2010

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