Question

15. If cotA = 1/√3then find the value of (1 - cos^2a)/(1 + cos^2a)​

Answer 1

Answer:

Step-by-step explanation:

cot 60=1/root3

cotA = 1/√3

so a =60

(1 - cos^2a)/(1 + cos^2a)​

(1-cos^4a)

1-(cos 60)^4

1-(1/2)^4

1-1/16

16-1/16

15/16

hope it helps u