Math, asked by jyothipuranik62153, 8 months ago

cos(90-A)cos(A)/cot A -1= -cos²A

Answers

Answered by baiv5681

1

Step-by-step explanation:

cos(90-A) cos(A)/cot A-1= -cos^2A

sin A × cos(A) / cot A- 1. (:cos(90-A) =sin A)

sin A × cos( A) /cos A- 1/sin A- 1

sin A× cos(A).sin A-1/ cos A -1

sinA× cosA-1×cosA.sinA-1 / CosA-1

sin^2A-1 × cos^2A-1 / CosA-1

=-cos^2A

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