Use a double-angle identity to find the exact value of the expression.
A. 
B. 
C. 
D. 
Answer: D
You might also like to view...
Find fx, fy, and fz.f(x ,y, z) = sin (xy) cos (yz2)
A. fx = y cos (xy) cos (yz2); fy = z2 sin (xy) sin (yz2)- x cos (xy) cos (yz2); fz = 2yz sin (xy) sin (yz2) B. fx = y cos (xy) cos (yz2); fy = x cos (xy) cos (yz2) - z2 sin (xy) sin (yz2); fz = -2yz sin (xy) sin (yz2) C. fx = y cos (xy) cos (yz2); fy = x cos (xy) cos (yz2); fz = -2yz sin (xy) sin (yz2) D. fx = y cos (xy) cos (yz2); fy = x cos (xy) cos (yz2) - z2 sin (xy) sin (yz2); fz = 2yz sin (xy) sin (yz2)
Solve the system by graphing. 3x + 2y = 5-6x - 4y = 5
A. No solution B. (-1.5, -1) C. (1, 1) D. (1.5, -1)
Find an equation of the tangent line at x = a.y = 
; a = -3
A. y = -1.5x - 2.25 B. y = -1.5x - 4.5 C. y = -1.5x + 2.25 D. y = -6x - 2.25
Provide an appropriate response.Select an appropriate type of modeling function for the data shown in the graph. Choose from exponential, logarithmic, and linear. 
A. Logarithmic B. Exponential C. Linear