Using a sum or difference identity, write the following as an expression involving functions of ?.sin (? + 2?)

A. -cos ?
B.  cos ? -  sin ?
C.  cos ? +  sin ?
D. sin ?


Answer: D

Mathematics

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A. m3 + 4m2 - 5m B. m2 - 4m + 5 C. m2 + 9m - 5 D. m2 + 4m - 5

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