without using tables, find the value of (7 sin 30 cos 60)

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Solution

$7 S i n 30 C o s 60 = 7 (\frac{1}{2}) (\frac{1}{2}) = \frac{7}{4} (\sin 30 = \frac{1}{2} a n d C o s 60 = \frac{1}{2})$

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