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1=6\times 0-1\sin(\frac{\pi }{2})
Get the value of \cos(\frac{\pi }{2}) from trigonometric values table.
1=0-1\sin(\frac{\pi }{2})
Multiply 6 and 0 to get 0.
1=0-1\times 1
Get the value of \sin(\frac{\pi }{2}) from trigonometric values table.
1=0-1
Multiply 1 and 1 to get 1.
1=-1
Subtract 1 from 0 to get -1.
\text{false}
Compare 1 and -1.
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