Question

Sin 5a - sin 3acos 5a + cos 3a​

Answer 1

Ответ:

Объяснение:

sin 5a - sin 3a=2*sin$\frac{5a+3a}{2}$cos$\frac{5a-3a}{2}$=2*sin4a cosa

cos 5a + cos 3a​=2*cos $\frac{5a+3a}{2}$cos $\frac{5a-3a}{2}$2*cos4a cosa

Answer 2

To simplify the expression `sin5A - sin3Acos5A + cos3A`, we can use various trigonometric identities.

Firstly, we can use the sum-to-product identities to rewrite `sin5A - sin3Acos5A` as `2sin4AcosA`.

Here's how:

1. Rewrite `sin5A - sin3Acos5A` as `sin5A - sin3A * cos5A` 2.