Question

sin A minus b is equals to sin a cos b minus cos a sin b find sin15 degree​

Answer 1

Hi there

Put A=45 and B=30

then,sin15=sin(A-B)=

sinAcosB-cosAsinB=sin45cos30-cos45sin30 (1)

Now,sin45=cos45=1/√2

and,sin30=1/2,cos30=√3/2

putting these values in equation (1)

we get

1/√2×√3/2-1/√2×1/2=√3/2√2-1/2√2=(√3-1)/2√2

Hope it Helps.

Answer 2

Hope you got your answer. If you have any doubt, ask me