?ABC is isosceles with AB ? AC and ?A = 60°. Prove that ?ABC is equilateral.
?B = ?C since they are opposite congruent sides. Also, their sum is 120°. Hence ?A =?B = ?C = 60,so ?ABC is equilateral.
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Factor the expression completely.
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A. 
B. 
C. 
D. 
Find an equivalent equation in rectangular coordinates.r = 2(sin ? - cos ?)
A. 2x2 + 2y2 = y - x B. 2x2 + 2y2 = x - y C. x2 + y2 = 2x - 2y D. x2 + y2 = 2y - 2x
Draw a unit circle centered at the origin and sketch ?A = 315°. Label as P where the side of A, not on the x-axis, intersects the unit circle. Find and label the coordinates of P on the unit circle.
What will be an ideal response?
Solve the problem.Suppose a projectile is launched from the origin into the first quadrant with an initial velocity v0 feet per second at an angle ? with the horizontal. If the only force acting on the projectile is the force of gravity (with acceleration, g = 32 ft/sec2), then the maximum height, H, attained by the projectile is given by 
A golf ball is hit with an initial velocity of 44 ft/sec with an angle 
Find the maximum height, H, attained by the ball. Round to the nearest foot.
A. 14 ft B. 21 ft C. 16 ft D. 15 ft