If sin a=0.31 cos a=0.95 sin b=0.47 and cos b=0.88 what is sin (a+b)?
0.78
-0.17
0.98
0.72
2 answers
sin(a+b)=sinacosb+sinbcosa=.31*.88+.47*.95= I get about .72
do you have the rest of the answers?