Math, asked by amol143b, 7 months ago

70
The value of cos
Pi/7
COS2pi/7
Cos4pi/7

Answers

Answered by reetikashah98

1

Solution:

=>cos pi/7 + cos (2pi)/7 + cos (4pi)/7

=>cos pi/7 (2+4)

=>6cos pi/7

=>6cos 22. [ value of pi = 22/7]

=>cos132

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HOPE IT WILL HELP YOU.....

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