Prove each identity.   sin (A + B) + sin (A - B) = 2 sin A cos B

Read the question carefully and answer them by writing its solution in your own handwriting and scan and upload it in its respective position in the quiz. sin Sy-sin 3y Simplify cos 5y+cos 3y 1 A▾ B I 2

Write cos(i – 4) in the form of a + bi.

duns a. 1 sin + cos 0