Perform the indicated operations and simplify the result so there are no quotients to complete the identity.sec ? - 
= ?
A. -2 tan2?
B. sec ? csc ?
C. 1 + cot ?
D. sin ? tan ?
Answer: D
Mathematics
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A. 
B. - 13
C. - 
D. 13
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A. 7
B. 7
C. 
D. 1
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Find the exact value. Do not use a calculator.cot 
A. -1 B. 1 C. 0 D. undefined
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Add or subtract as indicated.Subtract.
A. 12x8 + 6x7 + 14x6 - 15 B. 12x8 + 6x7 + 14x6 - 1 C. -2x8 + 6x7 + 14x6 - 15 D. -2x8 - 12x7 - 2x6 - 1
Mathematics