SOLUTION: expand and simplify cos(270 degrees-theta)

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Question 949690: expand and simplify cos(270 degrees-theta)
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
expand and simplify cos(270 degrees-theta)
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Ans: cos(270)cos(t) + sin(270)sin(t)
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= 0*cos(t) + (-1)(sin(t))
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= 0 - sin(t)
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= -sin(t)
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Cheers,
Stan H.
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