sinA/(1 + cos A) is equal to
Expression : $$\frac{sin A}{1 + cos A}$$
Multiplying numerator and denominator by $$(1 - cos A)$$
= $$\frac{sin A}{1 + cos A} \times \frac{1 - cos A}{1 - cos A}$$
= $$\frac{sin A(1 - cos A)}{1 - cos^2 A} = \frac{sin A(1 - cos A)}{sin^2 A}$$
= $$\frac{1 - cos A}{sin A} = \frac{1}{sin A} - \frac{cos A}{sin A}$$
= $$cosec A - cot A$$
=> Ans - (A)
Create a FREE account and get:
