Question
Asked Dec 5, 2019
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Simplify: (sin x + cos x)2

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Expert Answer

Step 1

Expand (sinx+cosx)^2 using (a+b)^2. 

(a+b)^2 = a^2 + ...

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(sin x+cos x) = sin’x +2(sinx)(cosx)+ cos²x

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