Solving using sin(A+B) and cos rule
Can someone show each od the steps and answer for this question. It will give something to work off for the rest of them. Very much appreciated
1) Using the identities for sin(A+B) and cos^2(theta)+sin^2(theta)=1.
Find sine 65 degrees, given that sin 40(degrees)=0.643 and sin 25(degrees)=0.423?