1
Question
Sin15.COS15=?
Sin15.COS15=?
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Solution
We know sin 2x = 2 sin x cos x
So, sin x cos x = (1/2) sin 2x
So, sin 15° cos 15° = (1/2) sin (2*15°)
= (1/2)sin 30°
= (1/2)×(1/2)
= 1/4
We know sin 2x = 2 sin x cos x
So, sin x cos x = (1/2) sin 2x
So, sin 15° cos 15° = (1/2) sin (2*15°)
= (1/2)sin 30°
= (1/2)×(1/2)
= 1/4
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