SOLUTION: is the value of sin(3t-540)can be written as -sin3t?

Question 422424: is the value of sin(3t-540)can be written as -sin3t?

Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
is the value of sin(3t-540)can be written as -sin3t?
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Note: sin(-x) = -sin(x)
cos(-x) = cos(x)
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sin(3t-540) = sin(3t)*cos(-540)+sin(-540)(cos(3t)
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= sin(3t)(cos(540))+[-sin(540)(cos(3t)
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= sin(3t5)(-1)+[-0*cos(3t)]
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= -sin(3t)
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Cheers,
Stan H.
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