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Trig Identites

by John
(Georgia)










































cosx*sinx + secx*cos^2x ---> 2*cosx

SImplify: cosx*sinx + secx*cosx^2 ,to 2*cosx

The help would be much appreciated,
Thank you

Comments for Trig Identites

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Dec 09, 2011
Trig Identities
by: Staff


Question:

by John
(Georgia)


cosx*sinx + secx*cos^2x ---> 2*cosx

SImplify: cosx*sinx + secx*cosx^2 ,to 2*cosx

The help would be much appreciated,
Thank you




Answer:


I was able to simplify cos(x)*sin(x) + sec(x)*cos^2(x), but the result does not match your problem statement.


cos(x)*sin(x) + sec(x)*cos^2(x)
sec x = 1/cos x


cosx*sinx + [1/cos(x)] *[cos^2(x)]

cos(x)*sin(x) + cos(x)

cos(x)*[sin(x) + 1]



Thanks for writing.

Staff
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