Math Is Fun Forum

tania.2

Guest

Trig

Could someone help me with my Trig assignment? I dont understand how to do it and ive looked over the lesson like three times.  THANK YOU!!!! Also, I put links to the images that go with the questions.

For angle x: http://www.sc.whitmoreschool.org/sec/students/classes/geometry/lesson11_files/image5A9.JPG 

1. What is the sin?

2. What is the cos?

3. What is the tan?

4. What is the sec?

5. What is the csc?

6. What is the cot?

Still looking at the image above, one angle is angle x, and another is the right angle (90o). Since the angles in a triangle add up to 180o, the other angle will be 90-x. For the unlabeled angle above, the angle 90-x:

7. What is the sin?

8. What is the cos?

9. What is the tan?

10. What is the sec?

11. What is the csc?

12. What is the cot?

13. If the cos of an angle is .75, what is the csc?

14. If the cot of an angle is 7/8, what is the tan?

You have collected data on several buildings.  For each building, you are given the angle of the line of sight up to the top of the building, and the distance to the building.  Calculate the height of each building.  http://www.sc.whitmoreschool.org/sec/students/classes/geometry/lesson11_files/fig0901.JPG

15.  Building 1 Angle 71o Distance 20 meters

16. Building 2 Angle 45o Distance 10 meters

17. Building 3 Angle 20o Distance 15 meters

18. Building 4 Angle 5o Distance 47.22 meters

19. Building 5 Angle 1o Distance 500 meters

20. You have climbed to the top of a tall tree. When you get to the top, you use your clinometer to discover that the angle between the tree and the line of sight to your red lunchbox is 30o. You know you left the lunchbox 20 meters from the base of the tree. How tall is the tree? (Careful! This is a little different than the building problems!) 

http://www.sc.whitmoreschool.org/sec/students/classes/geometry/lesson11_files/fig0904.JPG

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 48,856

Re: Trig

Hi tania.2,

I can help you to some extent. You would have to do the homework yourself. Or, take the help of teacher, the standard textbooks.

= Perpendicular/Hypotenuse = y/r

= Base/Hypotenuse = x/r

= Perpendicular/Base = y/x

= Hypotenuse/Perpendicular = r/y

= Hypotenuse/Base = r/x

= Base/Perpendicular = x/y

is measure of an angle. The measure of an angle is the amount of rotation from the initial side to the terminal side.

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iamaditya

Member

From: Planet Mars

Registered: 2016-11-15

Posts: 821

Re: Trig

Hi, you can see these 2 links which may be very helpful for you...

http://www.mathsisfun.com/algebra/trigo … index.html

https://www.khanacademy.org/math/geomet … igonometry

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