CAT WhatsApp Group
Sign in
Please select an account to continue using cracku.in
↓ →
CAT WhatsApp Group
Expression : $$\sqrt{\frac{1}{sin^2A}+\frac{1}{cos^2A}}$$
= $$\sqrt{\frac{sin^2A+cos^2A}{sin^2A.cos^2A}}$$
= $$\sqrt{\frac{1}{sin^2A.cos^2A}}=\frac{1}{sinA.cosA}$$
= $$\frac{sin^2A+cos^2A}{sinA.cosA}$$
= $$\frac{sin^2A}{sinA.cosA}+\frac{cos^2A}{sinA.cosA}$$
= $$\frac{sinA}{cosA}+\frac{cosA}{sinA}=tanA+cotA$$
=> Ans - (B)
Create a FREE account and get:
