if sun 30° =1/2 ,find the cos 30°=?
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sin 30 cos to 1 by 2 sin 45 quest to 1 upon root 2 sin 60 cos 2 under root of 3 upon 2 sin 90 + 21 similarly for cos cos 0 equals to 1 cos 30 kuchh to square root of 3 by 2 cos 45 equals to 1 upon root to which is same as of sin 45 cos 60 is equals to 1 by 2 cos 90
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root 3 /2
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