Answer to Question #33567 in Trigonometry for Kristen Woods

Question #33567

Let cos45=squareroot of 2 / 2. Which is cos135?

A. -squareroot of 2 / 3
B. squareroot of 2 / 2
C. squareroot of 2 / 3
D. -squareroot of 2 / 2

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