Question

Find the value of (cos + sin )^2 + (cos - sin )^2

Answer 1

Answer:

is a generic argument like x or θ , the simplified form will be an expression. If it has a particular argument like 0,π/2 , then the answer will be number, i.e. a value.

Assuming sin2θ−cos2θ ,

cos(2θ)=cos(θ+θ)=cos2θ−sin2θ .

Therefore, sin2θ−cos2θ=−cos(2θ) .

After you put a specific valur of θ , you'll get a value.

Answer 2

Step-by-step explanation:

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