Mhelody: given sin A=3/5;sin B=5/13,find sin(A+B)
Hi mhelody, what a familiar name you have there. where ever could I have seen one like that before?
Use the formula
sin(A+B) = sinAcosB + CosAsinB
If A=3/5
Draw a right angled triangle and lable an acute angle as A
label the opp side 3 and the hypotenuse 5. Now what is the other side? from there you will know what CosA is
Draw a differrent right angled triangle for the B triangle to get cosB
that is about it I guess.
+118723 
