Question

prove that sinA.sin(90-A)/cot(90-A)=1-sin²A​

Answer 1

Step-by-step explanation:

Sin A × Cos A (Sin 90-A=Cos A)

____________

Tan A ( Cot 90-A = Tan A)

Sin A × CosA × CosA

____

Sin A

SinA and Sin A gets cancelled

Cos A × Cos A = Cos²A = 1- Sin²A

Answer 2

Answer:

See the attachment