Use trigonometric identities to solve each equation in the interval [0, 2?]sin2 x - cos2 x = 0
A. 
B. 
, 
C. 
, 
D. 
, 
, 
, 
Answer: D
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Write an inequality involving the variable x that describes the set of numbers graphed.
A. x ? 6 B. x ? 6 C. x < 6 D. x > 6
Solve the problem.In a transformer, an electric current in one coil of wire induces a current in a second coil. For a transformer, 
= 
where i is the current and t is the number of windings in each coil. In a neon sign amplifier, i1 = 1.6 A and the turns ratio 
= 150. Find i2 rounded to four decimal places, if necessary.
A. 94 A B. 240 A C. 0.0107 A D. 1.0667 A
Identify the following as rational or irrational. If the number is rational, find the root exactly. If the number is irrational, approximate the number to the nearest thousandth when necessary.
A. Rational; 21 B. Irrational; 7.937 C. Rational; 31.5 D. Irrational; 3.979
Solve the radical equation.
- 
= 2
A. {-2, 2} B. {-3} C. {-2} D. {2}