verify the identity.

cos(pi-theta) + sin(pi/2 + theta) = 0

can anyone please explain... Thanks!!!

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- Nov 25th 2007, 01:41 PMoverduexVerify trig identity
verify the identity.

cos(pi-theta) + sin(pi/2 + theta) = 0

can anyone please explain... Thanks!!! - Nov 25th 2007, 02:12 PMSoroban
Hello, overduex!

One method is to use the Compound-angle Formulas:

. .

. .

Quote:

Verify the identity: .

Using the two formulas, we have:

. . ,. .

. .