Math, asked by sapnakalra46, 6 months ago

prove that cos 60 degree = 2 cos² 30 degree -1

Answers

Answered by andhadhun

2

Answer:

LHS : cos 60°=1/2

RHS: 2cos²30°-1=2×(√3/2)²-1

2×3/2-1 = 3-1=2

LHS=RHS=2 hence proved

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