Asked by EC
Find the exact value of cos 1 degree + cos 2 degrees + cos 3 degrees + ... + cos 357 + cos 358 degrees + cos 359 degrees.
Answers
Answered by
Steve
recall that cos(180-x) = -cos(x)
and just pair up the angles. The result will be quite simple.
and just pair up the angles. The result will be quite simple.
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