Answers and Explanations

TRIGONOMETRY FOLLOW-UP TEST

1 . B

Cosine  is  adjacent    over    hypotenuse. You’ll  have    to  use the Pythagorean

theorem to  find    the adjacent    leg:

2 . A

The numerator   is  the difference  of  squares and so  can be  factored:

The “cos^2 θ    +   sin^2 θ”    should  look    familiar—it equals  1.