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Mathematics 14 Online
OpenStudy (anonymous):

Find cos2A when tanA = 1/3 and π

OpenStudy (anonymous):

angle A is in quadrant 3... which means sinA and cosA both have the same sign, both negative.

OpenStudy (anonymous):

|dw:1353196847175:dw| can you give me the length of the hypotenuse in the triangle?

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