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What is the value of sin 90° × cos 90°?

What is the value of sin 90° × cos 90°?

A. -1

B. O

C. Undefined

D. (–1)

Correct Answer: B. O

Explanation: sin 90° = 1, cos 90° = 0, so 1×0 = 0.

In Microsoft Word, what does the shortcut key Ctrl + 5 do?

If ABCD is a square with A(2,3), B(1,2), C(–1,–2), then what are the coordinates of D?

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