If cos30° = root3/2, 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
= sin(45-30)
= sin45°.cos30° - cos45°.sin30°
= 1/√2 × √3/2 - 1/√2 ×1/2
= (√3 -1)/2√2
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