Solve, finding all solutions in [0, 2?).4 sin2x = 4 cos x + 1
A. 
, 
B. 
, 
C. 
, 
D. No solution
Answer: C
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?Which of the following is not true about pyramids?
A. ?A pyramid is a polyhedron. B. ?A pyramid has only one base. C. ?The lateral faces are the same shape as the base. D. ?The lateral faces are always triangles. E. ?Three type of pyramids are: rectangular pyramids, square pyramids, and triangular pyramids.
Solve the problem.The Redlich-Kwong equation provides an approximate model for the behavior of real gases. The equation is P(V, T) = 
- 
, where P is pressure, V is volume, T is Kelvin temperature, and a,b , and R are constants. Find the partial derivative of the function with respect to each variable.
A. PV = 
- 
; PT = 
+ 
B. PV = 
- 
; PT = 
+ 
C. PV = 
+ 
; PT = 
- 
D. PV = 
+ 
; PT = - 
+ 
Completely factor the polynomial or state that the polynomial is prime.2x2 - 50
A. 2(x + 5)(x - 5) B. prime C. 2(x + 5)2 D. 2(x - 5)2
Find y '.y = 
A. - 
+ 2x
B. 
+ 2x
C. - 
- 2x
D. - 
- 2x