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Express as a single trigonometric function

Mathematics
Tutor: None Selected Time limit: 0 Hours

cos(2x)+sin^2(x) divided by cos(x)

note: x is the variable

Mar 16th, 2015

we know cos (2x) = cos^2(x) - sin^2(x)

so, [cos(2x) + sin^2(x)]/cos(x)
=[cos^2(x) - sin^2(x) + sin^2(x)]/cos(x)
=cos^2(x)/cos(x)
=cos(x) is the answer.


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Mar 16th, 2015

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Mar 16th, 2015

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