Question: In Problems 5172, establish each identity. cos (20) 1 + sin(20) cot 0 - 1 cot + 1.

In Problems 51–72, establish each identity.cos (20) 1 + sin(20) cot 0 - 1 cot + 1.

cos (20) 1 + sin(20) cot 0 - 1 cot + 1.

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