Question

if cotA+1/cotA=1,then find cot^2A+1/cot^2A.

Answer 1

givencotA+1/cotA=2

let x=cotA

then x+1/x=2

squaring on both sides we get

x2+1/x2+2=4

so x2+1/x2=2

substituting x=cotA in above expression we get

cot2A+1/cot2A=2

Answer 2

Answer:

Step-by-step explanation:

Cota + 1/cota =2. Hence cot square a + 1 = 2cota. Thus (cota -1) square = 0. So,cota =1. And cot square a + 1/cot square a = 1 square +1/1 square = 1+1=2