Use implicit differentiation to find dy/dx.y
= 4
A. 
B. - 
C. 
D. - 
Answer: D
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Solve the problem.Find all points on the cardiod r = a(1 - cos ?) where the tangent line is horizontal.
A. 
, 
B. 
, 
C. 
, 
D. 
, 
Solve.Sally needs to determine the distance at certain points across a lake. Her crew and she are able to measure the distances shown on the diagram below. Find how wide the lake is to the nearest tenth of a meter.
A. 80 m B. 132.7 m C. 165.5 m D. 8.9 m
Find the exact value of the expression.cos 
sin 
- cos 
sin 
A. 
B. 
C. 
D. 1
Mark as true any statement that is always true. Mark as false any statement that is never true or that is not necessarily true. Be able to justify your answers.
1. Any set of three lines in the same plane has one pair of parallel lines and one transversal line. 2. To begin an argument using indirect reasoning, we assume that the hypothesis of the statement to be proved is true and that the negation of the conclusion of the statement is true. 3. If two lines cut by a transversal form a pair of supplementary corresponding angles with the transversal, then the lines are parallel. 4. The exterior angle to any vertex in a triangle is equal to the sum of any two interior angles in the triangle. 5. If two parallel lines are cut by a transversal, the alternate interior angles are congruent.