Establish the identity.cos(4u) = 2 cos2(2u) - 1
What will be an ideal response?
cos(4u) = cos[2(2u)] = 2 cos2(2u) - 1
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What part of the object or set of objects is shaded?
A. 
B. 
C. 
D. 
Solve the problem.An electrician has to choose different types of wire for different applications. The size of the diameter of the wire is inversely related to the gauge of the wire. The chart below shows some different gauges of wire and their approximate diameters. Use the chart to answer the question. 
What is the gauge of the wire with a diameter of 
inch?
A. 16 gauge B. 10 gauge C. 12 gauge D. 14 gauge
Evaluate the expression.(-5)3
A. -15 B. -125 C. 15 D. 125
The SAT scores (x) of Florida high school students are normally distributed with mean ยต= 1200 and standard deviation ?= 100. Top 33% of these students are expected to get full tuition scholarship. What is the minimum score for this scholarship?