Question

cos6A + sin6A +3sin2A . cos2A​ = 1​

Answer 1

Step-by-step explanation:

1. we will write sin^6 A as (sin^2 A)^3 and cos^6 A as (cos^2 A)^3
2. next we will compare with the formula (a+b)^3
3. putting the values according to the formula
4. we will get the values of "a" and "b"
5. next we will put the value of a and b in formula of (a+b)^3
6. we get (sin^2 A + cos^2 A)^3
7. now we know that sin^2 A + cos^2 A = 1
8. so 1^3 = 1
9. L.H.S = R.H.S

I HOPE IT HELPS YOU!!