Question

find the value of
sin 15° + cos 15°
​

Answer 1

Answer:

Sin15 * Cos15 = X

Above equation can be written as

Sin(60–45) * Cos(60–45) = X

Apply Sin(A-B) and Cos(A-B)

(Sin60*Cos45 - Cos60*Sin45) * (Cos60*Cos45 + Sin60*Sin45) = X

So the answer is 1/4.