Unit Test — Unit test Answers
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In a right triangle, angle A measures 20°. The side opposite angle A is 10 centimeters long. Approximately how long is the hypotenuse of the triangle?
A
3.4 centimetersB
10.6 centimetersC
27.5 centimetersD
29.2 centimeters22
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If angle B measures 25°, what is the approximate perimeter of the triangle below?
A
10.3 unitsB
11.8 unitsC
22.1 unitsD
25.2 units23
Consider the relationship below, given .Which of the following best explains how this relationship and the value of sin can be used to find the other trigonometric values?
A
The values of sin and cos represent the legs of a right triangle with a hypotenuse of 1; therefore, solving for cos finds the unknown leg, and then all other trigonometric values can be found.
B
The values of sin and cos represent the angles of a right triangle; therefore, solving the relationship will find all three angles of the triangle, and then all trigonometric values can be found.
C
The values of sin and cos represent the angles of a right triangle; therefore, other pairs of trigonometric ratios will have the same sum, 1, which can then be used to find all other values.
D
The values of sin and cos represent the legs of a right triangle with a hypotenuse of –1, since is in Quadrant II; therefore, solving for cos finds the unknown leg, and then all other trigonometric values can be found.
24
What is the exact value of ?
A
–1B
Negative StartRoot 2 EndRoot
C
1D
StartRoot 2 EndRoot
25
Three trigonometric functions for a given angle are shown below.What are the coordinates of point (x, y) on the terminal ray of angle , assuming that the values above were not simplified?
A
(–5, 12)B
(5, –12)C
(–12, 5)D
(12, –5)Did you find these answers helpful?
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