Mathematics, 17.02.2021 20:50 lovecats12
Which of the following are identities? Check all that apply.
A. cos(x+y)+cos(x-y)=cos^2x-sin^2y
B. sin(x-pi)=-sinx
C. sin(x+y)-sin(x-y)=2cosx siny
D. cos(x+y)+cos(x-y)=2cosx cosy
Answers: 2
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An angle that measures between 90 and 180° is called a(,
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Walking at a constant rate of 8 kilometers per hour, juan can cross a bridge in 6 minutes. what is the length of the bridge in meters?
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Which of the following are identities? Check all that apply.
A. cos(x+y)+cos(x-y)=cos^2x-sin^2y
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