Question

(1+cotA)²+(1-Cos A)²=2cosec²A

Answer 1

• 2 + 2 cos square a equals to 2 in bracket 1 + cot square a bracket close. Equals to 2 cos square a hence prove. 4.3.

Answer 2

Answer:

(1+cotA)²+(1-Cot A)²

= 1 + 2cotA + cot²A + 1 - 2cotA + cos²A

= 2 ( 1 + cot²A)

= 2cosec²A

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