Evaluate
\frac{7}{4}=1.75
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7\times \frac{1}{2}\cos(60)
Get the value of \sin(30) from trigonometric values table.
\frac{7}{2}\cos(60)
Multiply 7 and \frac{1}{2} to get \frac{7}{2}.
\frac{7}{2}\times \frac{1}{2}
Get the value of \cos(60) from trigonometric values table.
\frac{7}{4}
Multiply \frac{7}{2} and \frac{1}{2} to get \frac{7}{4}.
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