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Sidana [21]
3 years ago
7

Show that sin (x + pi) = -sin x.

Mathematics
1 answer:
Lunna [17]3 years ago
4 0

Answer:

The answer in the procedure

Step-by-step explanation:

we know that

sin(A + B) = sin A cos B + cos A sin B

In this problem we have

sin(x + \pi)=sin (x)cos(\pi) + cos(x)sin(\pi)

Remember that

sin(\pi) = 0

cos(\pi) = -1

substitute

sin(x + \pi) = sin(x)(-1) + cos(x)(0)

sin(x + \pi) = -sin(x)

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