Use the Half-angle Formulas to find the exact value of the trigonometric function. sin 
A. 
B. - 
C. - 
D. 
Answer: D
Mathematics
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Find the indicated cardinal number.Find n(A) given that n(A × B) = 22 and n(B) = 2.
A. 11 B. 20 C. 2 D. 24
Mathematics
Find the real solutions, if any, of the equation. Use the quadratic formula.7x = 1 + 
A. {- 
, 
}
B. {
}
C. {
, 
}
D. no real solution
Mathematics
Graph the polar equation.r = 
A. 
B. 
C. 
D. 
Mathematics
Decide whether an expression or an equation is given.7x - (2x - 5) - (-7x + 1)
A. expression B. equation
Mathematics