Math, asked by srikar8427, 8 months ago

$if2 cosx + 2 cos3x = cosyand2 sinx + 2 sin3xthen \: \cos2x$

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Answered by arainipushpa1984

0

Answer:

i am studying 8 so,i don't no

Answered by vk91552600

1

Answer:

what is cos please tell me i don't knoe about this type of Signs

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