Math, asked by anujajambika17, 1 month ago

sinplify 4(cos42°+cos102°+cos114°+cos174°)² into a rational number

Answers

Answered by abhinav9813

0

Step-by-step explanation:

2

1

.2sin15

o

cos15

o

=

2

1

sin30

o

=

4

1

i.e. rational.

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