Math, asked by kadambaladilleswarar, 8 months ago

why sin (-A) = - SinA

Answers

Answered by pracheecrpanda

0

Answer:

It is a formula ,moreover if we take Sin(b-a) where b=360 the sin 360= 0 and cos360=1

Step-by-step explanation:

sin(b-a)

sin(360-a)

sin360cos(a)-cos360sin(a)

0-(1)(sin a)

= -sina

thus sin(-a)= - sin a

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