Math, asked by jayalakshmi8668, 9 days ago

find the values of sin34 cos64 - cos64

Answers

Answered by ghoshsubhasish168

0

Answer:

Sin34° + Cos64° - Cos4°

= Sin34° + Cos(34 + 30)° - Cos(34 - 30)°

= Sin34° + (-2Sin34°Sin30°)

= Sin34° - 2 × Sin34° × 1/2

= Sin34° - Sin34°

= 0 (Proved)

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