SOLUTION: Use the addition and subtraction formula to simplify cos(x+pi)
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Question 91487
:
Use the addition and subtraction formula to simplify cos(x+pi)
Answer by
Nate(3500)
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cos(x +
) = cos(x)cos(
) - sin(x)sin(
)
cos(x)(-1) - sin(x)(0)
-cos(x)