Question

Prove that 2(sin^6A + cos^6A) - 3(sin^4A+ cos^4A) +1 = 0

Answer 1

Answer:

Step-by-step explanation:

2 ( sin ^2 A  )^3 + (cos^2 A)^3 - 3 ( sin^2 A )^2 + ( cos^2 A )^2 +1

2(sin^2+ cos^2)^3 - 3 ( sin^2 + cos^2 )^2 +1

2(1)^3 - 3( 1)^2+1

2 -3 +1

-1 +1

0

hence proved