Math, asked by ishitamondal86, 5 months ago

express as product form 1+2cos20°

Answers

Answered by Anonymous

14

Answer:

mmmmmmmhmmmmmmmmmmmmm........

Step-by-step explanation:

..............................

Answered by gita32

1

4(cos40°)(cos20°)

Step-by-step explanation:

1 + 2cos20°

= 2 (1/2 + cos20°)

= 2 (cos60° + cos20°)

= 2 (2 cos40° cos20°) [applying cosC+cosD]

= 4 (cos40°) (cos20°)

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