Question

what is value of sin15-sin75​

Answer 1

Answer:

-1/√2

Step-by-step explanation:

sin15-sin75

sin(45-30)-sin(45+30)

By using formula of sin(a+b) and sin(a-b)

we get

{sin45.cos30-cos45.sin30}-{sin45 .cos30+sin30.cos45}

{1/√2×√3/2-1/√2×1/2}-{1/√2×√3/2+1/√2×1/2}

=-1/√2