Establish the identity.cos2x - sin2x = 1 - 2 sin2x
What will be an ideal response?
cos2x - sin2x = cos2x + (sin2x - sin2x) - sin2x = (cos2x + sin2x) - sin2x - sin2x = 1 - 2 sin2x.
Mathematics
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Solve the problem. Round to the nearest cent.Winco Enterprise, Inc. bought a new computer system. To pay for the system, they borrowed 
at 
interest for 160 days. Find the interest owed. (Use a 365 day year.)
A. $938.13 B. $3752.50 C. $1579.13 D. $1644.93
Mathematics
Solve the problem.If a neighbor wants to create the area shown as a space for his dog to play, how much wire must he bury around the edge to create an "invisible" fence?
A. 12 m B. 28 m C. 24 m D. 26 m
Mathematics
Find the vertex of the parabola and graph it.
A. 
B. 
C. 
D. 
E. 
Mathematics
Solve the equation.2(8 - 2x) = 4
A. {4} B. {2} C. {3} D. {-3}
Mathematics