Question

(1+cosA)(1-cosA)(1+cot²A)=1​

Answer 1

(1+cosA)(1-cosA)(1+cot^{2}A)=1

Solution:

LHS =

=(1-cosA) (1+cosA) (1+cot^2A)

=(1-cos^2A) (1+cot^2A)

=sin^2A (1+cot^2A)

=sin^2A. cosec^2A

=sin^2A. 1÷sin^2A

=1

= RHS

                            Hence Proved  :)

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Answer 2

Answer:

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Step-by-step explanation:

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