Verify the identity.sin ?[sin ? + sin(5?)] = cos(2?)[cos(2?) - cos(4?)]
What will be an ideal response?
sin ?[sin ? + sin(5?)] = sin ?[2 sin(3?) cos(2?)] = 2 cos(2?)[sin ? sin(3?)] 
= cos(2?)[cos(2?) - cos(4?)]
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Plot the two points given by the ordered pairs.A(-5, 0), B(0, 5)
A. 
B. 
C. 
D. 
Write the equation in the standard form ax2 + bx + c = 0. Then identify the values of a, b, and c. Do not actually solve the equation.x = 0.1x2 + 10.5
A. a = 0.1, b = 10.5, c = -1 B. a = 0.1, b = -1, c = 10.5 C. a = 0.1, b = -1, c = -10.5 D. a = -0.1, b = -1, c = -10.5
Using the factoring method, solve for the roots of the quadratic equation.b2 + 15b = 0
A. b = 15, b = 0 B. b = 1, b = -15 C. b = -15, b = 0 D. b = -1, b = -15
Let v and w be two vectors in the plane with given magnitudes. The angle between v and w is ?. Find the expression. Round the answer to the nearest tenth.
= 5, 
= 9, ? = 51°
Find 
A. 10.3 B. -42.6 C. 7.0 D. 12.8