Use the product-to-sum formulas to rewrite the expression as the sum or difference of two functions.sin 3? sin 5?

A. -  cos 2? -  cos 8?
B.  cos 2? -  cos 8?
C.  cos 8? -  sin 2?
D. sin2 15?2

Answer: B

Mathematics

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Set up the iterated integral for evaluating   Dover the given region D.D is the solid right cylinder whose base is the region in the xy-plane that lies inside the cardioid  and outside the circle  and whose top lies in the plane .

A.
B.
C.
D.

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Solve the problem.A motorcycle and a car leave an intersection at the same time. The motorcycle heads north at an average speed of 20 miles per hour, while the car heads east at an average speed of 48 miles per hour. Find an expression for their distance apart in miles at the end of t hours.

A. t miles
B. 2t miles
C. 52 miles
D. 52t miles

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Find the equation of the line described, and express your answer in the specified form.Perpendicular to the line ; passes through the point (5, 3); slope-intercept form

A. y = 4x - 23
B. y = - 4x + 23
C. y = - x - 
D. y = - 4x - 23

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Mathematics

Simplify the expression.

A.
B.
C.
D. None of these

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Mathematics