Math, asked by sushilbayen8809, 1 year ago

Cos 3x + cos x + cos 2x = 0

Answers

Answered by tiya9854334p1sezx

0

Step-by-step explanation:

hope it will be helpful

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Answered by chanukya3

1

X=18°

Step-by-step explanation:

Cos3X+cosX+cos2X= 0

Cos5X=0

Cos90°=0

Cos5X=cos90°

5X=90°

X=18°

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