For the given rectangular equation, write an equivalent polar equation.x2 - y2 = 4

A. cos2? - sin2? = 4r
B. cos2? - sin2? = 4
C. r2cos 2? = 4
D. r cos 2? = 4


Answer: C

Mathematics

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Perform the indicated operation. Simplify if possible. + 

A.
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Mathematics