Question

hello please improve sin15+cos15

Answer 1

To answer this question we will use the simple concept of sin2x=2 sinx cosx

Now in this question, just simply multiply the numerator and denominator by 2.

This leaves us with 2 sin15 cos15/2(which is just exactly as your question but in a slightly modified form)

Thus the expression in the numerator gets simplified using the formula mentioned above to sin30(as 2 sin15 cos15 = sin30)

Thus the question simplifies to sin30/2.

Thus the answer is 1/4.

Hope this helps