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sin 240^@ + sin 120^@=...

`sin 240^@ + sin 120^@`=

A

0

B

-1

C

3

D

none

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sin240^@+sin120^@ = ……………

sin 10^(@) + sin 20^(@) + sin 40^(@) + sin 50^(@) - sin 70^(@) - sin 80^(@) =

sin 20^(@) * sin 40^(@) * sin 60^@ * sin 80^(@) =

sin 40^(@) - sin 80^(@)+ sin 160^(@) =

sin 48^(@) * sin 12^(@) =

Prove that sin 50^(@) - sin 70^(@) +sin 10^(@) =0 .

sin 120^(@) cos 150^(@)- cos 240^(@) sin 330^(@) =

The period of sin x sin(120^(@) + x) sin(120^(@) -x) is

sin 10^(@) sin 30^(@) sin 50^(@) sin 70^(@) sin 90^(@)=