Find the exact value of the expression.sin 20° cos 40° + cos 20° sin 40°
A. 
B. 
C. 
D. 
Answer: A
Mathematics
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Find the LCD for the given rational expressions.
, 
A. x(x - 6)(x - 2) B. x(x - 4)2 C. x(x - 4)(x - 2) D. (x - 4)2
Mathematics
Solve.The angle of reflection ? of a ray from air to a medium of index n is given by Snell's Law to be sin ? = 1/n. Find ? if n = 7/6.
A. 31.0° B. 121.0° C. 59.0° D. 1.6°
Mathematics
Use the remainder theorem to find the remainder when f(x) is divided by x - c.f(x) = x4 + 8x3 + 12x2; x + 1
A. -5 B. 5 C. -21 D. 21
Mathematics
Evaluate the following improper integral whenever it is convergent.
?
?
A. 2 B. -8 C. 4 D. 8 E. the integral is divergent
Mathematics