# Trigonometry

• Jun 8th 2008, 01:53 PM
missjky
Trigonometry
Is Ther Anyone That Is Really Smart In Trigonometry I Need Help Asap
• Jun 8th 2008, 01:54 PM
Jonboy
you're at the right place. what is the problem?
• Jun 8th 2008, 02:07 PM
missjky
Quote:

Originally Posted by Jonboy
you're at the right place. what is the problem?

Find the complement of a 51 ° 49' angle.
a. 38 ° 11'
b. 128 ° 11'
c. 38 ° 51'
d. 128 ° 51'
• Jun 8th 2008, 02:09 PM
missjky
Quote:

Originally Posted by missjky
Find the complement of a 51 ° 49' angle.
a. 38 ° 11'
b. 128 ° 11'
c. 38 ° 51'
d. 128 ° 51'

Find the supplement of the radian measure 7 π /8. Express your answer in terms of π .
a. 13 π /8
b. π /8
c. 9 π /8
d. 5 π /8

Find the value of sec 38 ° to 4 decimal places.
a. 1.6243
b. 0.7880
c. 0.6157
d. 1.2690

Find the value of tan 42 ° to 4 decimal places.
a. 2.2914
b. 0.9004
c. 1.1106
d. 0.7431

Find the exact value of sin 30 ° - sin 45 ° cos 45 ° .
a. 0
b. 1/2
c. 1
d. 2

Find the exact value of cos http://ce.byu.edu/courses/hs/9990640.../TRIG41-52.gif.
a. http://ce.byu.edu/courses/hs/9990640.../TRIG41-53.bmp
b. http://ce.byu.edu/courses/hs/9990640.../TRIG41-54.bmp
c. http://ce.byu.edu/courses/hs/9990640.../TRIG41-55.bmp
d. 2

If θ is an acute angle in standard position and cot θ = 12/5, find sin θ .
a. 12/13
b. 5/13
c. 13/12
d. 13/5
• Jun 8th 2008, 02:15 PM
missjky
[quote=missjky;155287]

Basically i need help on all these problems

1. Find the complement of a 51 ° 49' angle.
a. 38 ° 11'
b. 128 ° 11'
c. 38 ° 51'
d. 128 ° 51'

2. Find the supplement of the radian measure 7 π /8. Express your answer in terms of π .
a. 13 π /8
b. π /8
c. 9 π /8
d. 5 π /8

3. Classify 725 ° by quadrant, and state the positive angle with measure less than 360 ° that is coterminal with it.

4. Convert 105 ° to exact radian measure.
a. 6 π /7
b. 12 π /7
c. 7 π /6
d. 7 π /12

5. Convert the radian measure 7 π /5 to exact degree measure.
a. 128.5 °
b. 252 °
c. 504 °
d. 126 °

6. Convert the radian measure 1.6 to degree measure to the nearest hundredth of a degree.
a. 91.67 °
b. 288 °
c. 183.35 °
d. 97.40 °

7. Find the measure in radians of the central angle of a circle with radius 4 inches and arc length 8 inches.
a. 32
b. 0.5
c. 2
d. 2 π

8. Find the length of an arc that subtends a central angle of 150 ° in a circle of radius 5 centimeters.
a. 25 π /6 centimeters
b. 750 centimeters
c. 30 centimeters
d. π /6 centimeters

9. Find the values of the six trigonometric functions of the acute angle in standard position with the terminal side passing through the point P(8, 6).
a. sin θ = 3/5; cos θ = 4/5; tan θ = 4/3; csc θ = 5/3; sec θ = 5/4; cot θ = 3/4
b. sin θ = 4/5; cos θ = 3/5; tan θ = 4/3; csc θ = 5/4; sec θ = 5/3; cot θ = 3/4
c. sin θ = 3/5; cos θ = 4/5; tan θ = 3/4; csc θ = 5/3; sec θ = 5/4; cot θ = 4/3
d. sin θ = 4/5; cos θ = 3/5; tan θ = 3/4; csc θ = 5/4; sec θ = 5/3; cot θ = 4/3

10. If θ is an acute angle in standard position and cos θ = 4/5, find sin θ .
a. 4/3
b. 5/4
c. 5/3
d. 3/5

11. If θ is an acute angle in standard position and cot θ = 12/5, find sin θ .
a. 12/13
b. 5/13
c. 13/12
d. 13/5

12. Find the exact value of cos http://ce.byu.edu/courses/hs/9990640.../TRIG41-52.gif.
a. http://ce.byu.edu/courses/hs/9990640.../TRIG41-53.bmp
b. http://ce.byu.edu/courses/hs/9990640.../TRIG41-54.bmp
c. http://ce.byu.edu/courses/hs/9990640.../TRIG41-55.bmp
d. 2

13. Find the exact value of sin 30 ° - sin 45 ° cos 45 ° .
a. 0
b. 1/2
c. 1
d. 2

14. Find the value of tan 42 ° to 4 decimal places.
a. 2.2914
b. 0.9004
c. 1.1106
d. 0.7431

15. Find the value of sec 38 ° to 4 decimal places.
a. 1.6243
b. 0.7880
c. 0.6157
d. 1.2690
• Jun 8th 2008, 02:22 PM
wingless