Question

If 3 cot A = 4, check whether
1 - tanA
1 + tan? A
= cosA-sin-A or not.​

Answer 1

Answer:

3cotA = 4

=> cotA = 4/3

=> Perpendicular = 3 & base = 4

=> H =(4^2+3^2)^-1/2 = 5

Given

LHS

(1-tanA)(1+tanA)

= (1-tan^2A)

= (1-3/4)

=1/4

RHS

CosA - SinA

=4/5-3/5

= 1/5

=> LHS≠RHS