Let . If when

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?



A.
B.
C.
D.

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Answer: B

Mathematics

Find the exact value of the expression using the provided information.Find cos(A - B) given that cos A = - , with A in quadrant III, and  with B in 

A.
B.
C.
D.

Use a graphing calculator to determine which expression completes the identity.The expression  is to be the left hand side of an equation that is an identity. Which one of the following four expressions can be used as the right hand side of the equation to complete the identity?

A. tan x B. csc x C. cos x D. sec x

Find the length of the missing side of the right triangle. Round to three decimal places, if necessary. The legs of the right triangle are represented by a and b, and the hypotenuse is represented by c.b = 3, c = 

A. a = 3.162 B. a = 18.762 C. a = 4.162 D. a = 5.292

Provide an appropriate response.Use the product properties of summations to rewrite .

A. -5i²
B. -5 i²
C. -5 i
D. -5i