Decide whether the expression is or is not an identity.cos (A + ?) = cos A

A. Not an identity
B. Identity

Answer: A

Mathematics

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Multiply or divide.(-40)

A. - 
B.
C. - 
D.

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Write as a percent. 0.34

A. 3.4% B. 34% C. 0.034% D. 340%

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Solve.Toni needs to cut a 5 - foot board into 3 equal pieces. How long should each piece be?

A. 2 ft
B. 1 ft
C. 5  ft
D. 17 ft

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Mathematics

Determine which value(s), if any, must be excluded from the domain of the variable in the expression.

A. x = -2 B. x = 0 C. x = 2, x = -2 D. x = 2, x = 0

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Mathematics