Math, asked by editorsahab001, 7 months ago

If 0=30°,verify that
cos 20= 2 cos square 0-1

Answer it,Please

Answers

Answered by umaaswin81

1

Answer:

cos2×30=2cos^2 30-1

cos60=2cos^30-1

1÷2=2×(√3÷2) ^2-1

0.5=2×(3÷4) -1

0.5=0.5

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