Solve the equation on the interval 0 ? ? < 2?.2 cos2 ? - 3 cos ? + 1 = 0
A. 0, 
, 
B. 0, 
, 
C. 0, 
, 
D. 
, 
, 
Answer: C
Mathematics
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Find the derivative.y = 4x2 + 10x + 5x-3
A. 8x - 15x-4 B. 8x + 10 - 15x-4 C. 8x + 10 + 15x-4 D. 4x + 5x-4
Mathematics
Solve using the quadratic formula. Use a calculator to approximate the solution to three decimal places.
x2 - 
x = -1
A. -1.5 B. ± 0.667 C. 1.5 D. 0.086, 2.914
Mathematics
Factor and simplify the expression.sec4x - 2 sec2x tan2x + tan4x
A. sec2x (1 + tan2x) B. 2 C. sec2x + tan2x D. 1
Mathematics
Solve.The price of a jacket was reduced from $117 to $81.90. What was the percent of decrease in the price?
A. 30% B. 3% C. 31% D. 32%
Mathematics