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cos a + cos b + cos c = sin a +sin b+ sin c =0 then value of cos 3a + cos 3b+ cos 3c is.... a)0 b)cos(a+b+c) c)3 cos(a+b+c) d)3 sin(a+b+c) Please show steps.

cos a + cos b + cos c = sin a +sin b+ sin c =0 then value of cos 3a + cos 3b+ cos 3c is....
a)0
b)cos(a+b+c)
c)3 cos(a+b+c)
d)3 sin(a+b+c)
Please show steps.
 

Grade:

1 Answers

Anish Singhal
askIITians Faculty 1194 Points
3 years ago
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