Problem

12. cos⁡θ(1+tan2⁡θ)

Answer

Expert–verified
Hide Steps
Answer

cos⁡θ(1cos2⁡θ)

Steps

Step 1 ：cos⁡θ(1+tan2⁡θ)

Step 2 ：cos⁡θ(1+sin2⁡θcos2⁡θ)

Step 3 ：cos⁡θ(cos2⁡θ+sin2⁡θcos2⁡θ)

Step 4 ：cos⁡θ(1cos2⁡θ)

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