Multiply and simplify.sin ? (sec ? tan ? + csc ? + cot ?)
A. sec2? + cos ?
B. 1 + 2 sin2?
C. sin ? + 2 sec ?
D. sin2? - 1 + cos ?
Answer: A
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Solve the equation by completing the square.x2 + 3x - 9 = 0
A. {-3 - 3
, -3 + 3
}
B. 
C. 
D. 
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