Question

Prove that Cos^4x + sin^4x =1/2(1+2a^2-a4) where a=sinx + cosx


Here is a solution which is more straightforward solution to this problem using basic Algebra formulas.... Am putting it out there in case it can help somebody​

Answer 1

Answer:

cos^4x+sin^4x=1,2(1+2a^2-a ^4)w h e r ea=sinx+cosx. ... cos4x+sin4x =12(1+2a2-a4)wherea=sinx+cosx. 21.5 K ... Show that `2(sin^6x+cos^6x)-3(.

Answer 2

Step-by-step explanation:

it would be better than yours easy to understand