SOLUTION: Write the expression as the cosine of the angle cos130(degrees)cos40(degrees) + sin130(degrees)sin40(degrees)

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Question 852468: Write the expression as the cosine of the angle
cos130(degrees)cos40(degrees) + sin130(degrees)sin40(degrees)
Found 2 solutions by stanbon, Alan3354:
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Write the expression as the cosine of the angle
cos130(degrees)cos40(degrees) + sin130(degrees)sin40(degrees)
----
= cos(130-40) = cos(90) = 0
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Cheers,
Stan H.
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Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
= cos(130 - 40)
= cos(90) = 0