sin 15 degree value is
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Sin15°
We can also write it as
Sin(45° - 30°)
Sin(a-b) = SinaCosb - CosaSinb
So by following this,
Sin(45° - 30°)
=> Sin45°Cos30° - Cos45°Sin30°
=> (1/√2)(√3/2) - (1/√2)(1/2)
=> (√3/2√2) - (1/2√2)
=> (√3-1)/2√2
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