Simplify.
2
A.
B.
C.
D.
Answer: A
Mathematics
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Find the exact value of the expression.cos 40° cos 20° - sin 40° sin 20°
A.
B.
C.
D.
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Divide, if possible. If a quotient is undefined, state so.68 ÷ (-68)
A.
B. 1
C. -1
D. 0
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Find A-1 without a calculator.A =
A. A-1 =
B. A-1 =
C. A-1 =
Mathematics
Divide, if possible. If the quotient is undefined, then state this.
A.
B. 4
C. -4
D. -6
Mathematics