given that sin (a + b) = sin a cos b + cos a sin b find the value of sin 15°
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sin15 °=sin(45-30)°
=sin45°cos30°+cos45°sin30°
=1/√2×√3/2+1/√2×1/2
=√3+1/2√2
=sin45°cos30°+cos45°sin30°
=1/√2×√3/2+1/√2×1/2
=√3+1/2√2
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