SOLUTION: simplify cos(x+π)

SOLUTION: simplify cos(x+π)

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Question 613947: simplify cos(x+π)
Answer by jsmallt9(3758) (Show Source): You can put this solution on YOUR website!

Just use the cos(A+B) formula:
cos(A+B) = cos(A)cos(B) - sin(A)sin(B)
with "A" being "x" and "B" being "":

Since and this simplifies:

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