What is sin(45)
A. -.25
B. -1.25
C. 63
D. .71

Sin(45) = 0.7071

which can be rounded to 0.71

The answer is D.

Word: Reciprocal

The reciprocal (also known as the multiplicative inverse) is the number we have to multiply to get an answer equal to the multiplicative identity, 1 . Since 1×1=1 , the reciprocal of 1 is 1 . (The only numbers that are their own reciprocals are 1 and −1 .)

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