CAT WhatsApp Group
Sign in
Please select an account to continue using cracku.in
↓ →
CAT WhatsApp Group
Expression : $$(1 + cotA)^{2} + (1-cotA)^{2}$$
= $$(1+cot^2A+2cotA)+(1+cot^2A-2cotA)$$
= $$2+2cot^2A=2(1+cot^2A)$$
$$\because$$ $$(cosec^2A-cot^2A=1)$$
= $$2cosec^2A$$
=> Ans - (A)
Create a FREE account and get:
