Find the exact value by using a half-angle identity.sin 
A. 
B. 
C. 
D. 
Answer: C
Mathematics
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Find the angle between u and v in radians.u = -5i - 7j, v = 4i + 5j + 9k
A. 1.86 B. 1.58 C. 2.19 D. -0.62
Mathematics
Simplify.
A. 4
B. 24
C. 4
D. 4
Mathematics
Solve the equation.61 = 7x - 9
A. {17} B. {67} C. {63} D. {10}
Mathematics
Simplify the polynomial by adding or subtracting, as indicated. Express your answer as a single polynomial in standard form.Subtract (4x5 - 7x3 - 20) from (8x5 + 10x3 - 4).
A. 4x5 + 17x3 - 24 B. 37x8 C. 4x5 + 17x3 + 16 D. 4x5 + 14x3 - 24
Mathematics