Question

. If SinA = a; SinB=b; Cos A=c; Cos B =d

Then Evaluate,

1) Sin(A+B)

2) Cos(A+B)​

Answer 1

Answer:  1) ad +bc

               2) cd-ab

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Step-by-step explanation:  

sin ( A+B) = sinA cosB + cosA sinB

 sin (A+B) =a x d +b x c

                 = ad +bc

cos (A+B) = cosA cosB  -- sinAsinB

               =  c x d - a x b

            = cd-ab

Answer 2

Step-by-step explanation:

this is the answer for the given question