Trigonometry Examples

$\sin (3 x) \sin (5 x)$

Step 1

Apply the sine triple-angle identity.

$(- 4 \sin^{3} (x) + 3 \sin (x)) \sin (5 x)$

Step 2

Apply the distributive property.

$- 4 \sin^{3} (x) \sin (5 x) + 3 \sin (x) \sin (5 x)$