Use the information given about the angle ?, to find the exact value of the indicated trigonometric function.cos ? = - 
, ? in quadrant II Find cos 2?.
A. 
B. 
C. - 
D. - 
Answer: C
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Use the graph of a quadratic function to find the solution set of the equation or inequality. For a solution set that involves an interval, use interval notation.x2 - 7x + 10 ? 0
A. [2, 5]
B. (-?, 2) ? (5, ?)
C. x = 2, 5
D.
| (2, 5) |
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. An “exercise” can be solved by simply applying a routine procedure, but a “problem” is not routine and requires a well-thought-out plan of attack. 2. If there are infinitely many numbers involved in a problem, the Guess and Test problem-solving strategy is indicated. 3. If 12 coins are arranged in the shape of an equilateral triangle, then there are 5 coins along each side. 4. If the fourth phase of problem solving,“Looking Back,” we should look for other ways to solve the problem even if we got the ‘right’ answer.
Determine whether the relation is a function.{(-5, 3), (-2, -2), (4, 5), (8, 9)}
A. Not a function B. Function
Divide.(x2 - 144) ÷ (x + 12)
A. x2 - 12 B. x - 144 C. x + 144 D. x - 12