Question

If sin A + sin B = C, cos A + cos B = D, then the value of sin (A + B) = ?

Answer 1

Answer:

Wehave

sinA+sinB=C,

and

cosA+cosB=D

Now,

(sinA+sinB)

2

=sin

2

A+2sinAsinB+sin

2

B=C

2

And,(cosA+cosB)

2

=cos

2

A+2cosAcosB+cos

2

B=D

2

Byaddingthemweget

1+2(sinAsinB+cosAcosB)=C

2

+D

2

or, sin(A+B)=

2

C

2

+D

2

−1.

Step-by-step explanation:

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Answer 2

Answer:

Thanks for your wishes

Step-by-step explanation:

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