Question

DATE:
prove
Cos^2 3x - Cos^2 5x= sin2x.sin8x​

Answer 1

Answer:

$cos ^{2} {3x} - cos ^{2} {5x} = sin2x.sin8x$

Step-by-step explanation:

cos ^{2} {3x} - cos ^{2} {5x}

• we know that : cos ^{2}x+sin^{2}x=1

then

1-sin ^{2}