Question

integration of 4 cos x/2.cos x.cos 21 X/ 2 ​

Answer 1

Step-by-step explanation:

∫ cos 3 x d x \int \cos^{3}x \, dx ∫cos3xdx. Use Pythagorean Identities: cos 2 x = 1 − sin 2 x \cos^{2}x=1-\sin^{2}x cos2x=1−sin2x. Use Integration by Substitution. Using u and d u du du above, rewrite ∫ ( 1 − sin 2 x ) cos x d x \int (1-\sin^{2}x)\cos{x} \, dx ∫(1−sin2x)cosxdx.