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Precalculus - Chapter 7 Test

Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 1. 

MULTIPLE CHOICE.  Choose the one alternative that best completes the statement or answers the question.

Graph the function. Show at least one period.

y = mc001-1.jpg cotmc001-2.jpg
a.
mc001-3.jpg
c.
mc001-5.jpg
b.
mc001-4.jpg
d.
mc001-6.jpg
 

 2. 

Graph the sinusoidal function using key points.



y =  -4 sinmc002-1.jpg  - 2

a.
mc002-2.jpg
c.
mc002-4.jpg
b.
mc002-3.jpg
d.
mc002-5.jpg
 

Numeric Response
 

 3. 

SHORT ANSWER.  Write the word or phrase that best completes each statement or answers the question.

Find the length s. Round the answer to three decimal places.

1)


nr003-1.jpg

 

 4. 

Convert the angle in degrees to radians. Express the answer as multiple of ð.

2)

-480°

 

 5. 

Convert the angle in radians to degrees.

3)

nr005-1.jpg

 

 6. 

Solve the problem.



A circle has a radius of 7 centimeters. Find the area of the sector of the circle formed by an angle of nr006-1.jpg If necessary, round the answer to two decimal places.

 

 7. 

Two sides of a right triangle ABC (C is the right angle) are given. Find the indicated trigonometric function of the given angle. Give exact answers with rational denominators.



Find csc B when a = 7 and b = 4.

 

 8. 

Solve the problem.


Find the exact value of each of the six trigonometric functions of the angle P.
nr008-1.jpg

 

 9. 

Use Fundamental Identities and/or the Complementary Angle Theorem to find the exact value of the expression. Do not use a calculator.



nr009-1.jpg  70° + nr009-2.jpg  70°

 

 10. 



tan  70° - nr010-1.jpg

 

 11. 

Use the definition or identities to find the exact value of the indicated trigonometric function of the acute angle è.



sec ènr011-1.jpg Find csc è.

 

 12. 

Use Fundamental Identities and/or the Complementary Angle Theorem to find the exact value of the expression. Do not use a calculator.


nr012-1.jpg  5° - nr012-2.jpg  85°

 

 13. 

Find the exact value of the expression if è = 30°. Do not use a calculator.
f(è) =  cos è Find nr013-1.jpg.

 

 14. 

Find the exact value of the expression if è = 60°. Do not use a calculator.

f(è) = sin è Find nr014-1.jpg.

 

 15. 

Find the exact value of the expression. Do not use a calculator.

1 - nr015-1.jpg 30° - nr015-2.jpg 60°

 

 16. 

Solve the problem.

A twenty-five foot ladder just reaches the top of a house and forms an angle of 41.5° with the wall of the house. How tall is the house? Round your answer to the nearest 0.1 foot.

 

 17. 

A point on the terminal side of angle è is given. Find the exact value of the indicated trigonometric function.

(-3, -2) Find sec è.

 

 18. 

Use a coterminal angle to find the exact value of the expression. Do not use a calculator.

sin nr018-1.jpg

 

 19. 

Use the reference angle to find the exact value of the expression. Do not use a calculator.

cot nr019-1.jpg

 

 20. 

Find the exact value of the indicated trigonometric function of è.
sec
è = nr020-1.jpg ,   è in quadrant IV Find tan è.

 

 21. 

The point P on the circle nr021-1.jpg + nr021-2.jpg = nr021-3.jpg that is also on the terminal side of an angle è in standard position is given. Find the indicated trigonometric function.

( -5,  4) Find cot è.

 

 22. 

Without graphing the function, determine its amplitude and period.

y =  nr022-1.jpg cos (- nr022-2.jpgx) Find the amplitude.

 

Short Answer
 

 23. 

Write the equation of a sine function that has the given characteristics.

Amplitude:  4
Period:  5
ð

Phase Shift: sa023-1.jpg
 

 24. 

Find (i) the amplitude, (ii) the period, and (iii) the phase shift.

y = - sa024-1.jpg cos(2x - 2ð)
 



 
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