Question

How do you prove `(sin A + tan A) / (1+ cos A) = tan A`?

Answer 1

Prove trig expression

Explanation:

`(sin A + sin A/(cos A))/(1 + cos A) =`

`(sin A.cos A + sin A)/(cos A(1 + cos A)) =`

`= [sin A(1 + cos A))/(cos A(1 + cos A)] = sin A/(cos A) = tan A`