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This is a really tough example. See if it makes any sense to you, GOOD LUCK
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Questions about Analytic Trigonometry Verifying Trig Identities 33
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verify the follow: cos(pi+x)cos(pix)=1sin^2(x)?
This is a difficult question to think about. But here are some suggestions as to how you can begin to think and verify the equation. 1) Think about the popular trigonometric identity cos^2(x) + sin^2(x)=1. 2 ...