Check the answer. If incorrect, give the correct answer.
A. Incorrect; should be 31 R1
B. Incorrect; should be 31
C. Correct
D. Incorrect; should be 30 R2
Answer: A
Mathematics
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Use sum-to-product formulas to rewrite the expression as a product.cos 7? - cos 3?
A. -2 cos 5x sin 2x B. 2 cos 5x cos 2x C. -2 sin 5x sin 2x D. 2 cos 2x
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Convert the given polar coordinates of the point to rectangular coordinates.(10, 225°)
A. (-5
, -5)
B. (5, 5
)
C. (-5
, -5
)
D. (5
, 5)
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Write the following in scientific notation.1100
A. 1.1 × 103 B. 1.1 × 10-3 C. 1.1 × 102 D. 1.1 × 10-2
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Use the given trigonometric function value of ? to find the requested trigonometric function value of the acute angle ?. Rationalize the denominator where necessary.cos ? = 
Find csc ?.
A. 
B. 
C. 
D. 
Mathematics