# TeeKay

Popular questions and responses by TeeKay
1. ## Trigonometry

Use the equation mg sin A = umg cos A to determine the angle at which a waxed wood block on an inclined plane of wet snow begins to slide. Assume the coefficient of friction, u, is 0.17.

2. ## Math

A carpenter makes a triangular frame by joining three pieces of wood that are 20 cm, 24 cm, and 30 cm long. What is the measure to the nearest degree of the smallest angle in the frame? (Enter only the number.)

3. ## Math

A 21-foot ladder is leaning against a building. The base of the ladder is 7 feet from the base of the building. To the nearest degree, what is the measure of the angle that the ladder makes with the ground? (Hint: Sketch the problem before solving.)

4. ## Trigonometry

Solve the equation cos2θ = 1/2sinθ 0º≤θ≤90º. (Hint: Graph each side of the equation and determine where the graphs intersect.)

5. ## Trigonometry

Solve 2cos^2θ/2 = cos2θ for 0º≤θ≤360º. (Hint: Graph each side of the equation and find the points of intersection.) A) ≈73.8º; 260.4º B) ≈141.3º; 218.7º C) ≈225.7º; 315.8º D) ≈51.7º; 138.2º

6. ## Math

A simplified version of the expression 2sinθ (cos θ)(cotθ) is

7. ## Math

Alan is using the equation mg sin A = umg cos A to determine the coefficient of friction, u, between a flat rock and a metal ramp. Find u to the nearest hundredth, if the rock begins to slide at 19º.

8. ## Math

A roofer must set up a 40-foot ladder against the side of a house. He sets the ladder so that the distance from the base of the ladder to the wall is 1/5 of the length of the ladder. To the nearest degree, what acute angle does the ladder make with the

9. ## Pre-Calculus

Suppose person A collaborated with person B, who has collaborated with person C, who has collaborated with Paul Erdös. Suppose also that person B never collaborated with Paul Erdös and person A never collaborated with anyone with an Erdös number of 1 or

10. ## Pre-Calculus

The solution of the system of three inequalities is given by a polygonal convex set. 8x + 2y ≥ 36 -3x + 6y ≤ 27 -7x + 5y ≥ -18 The function f(x,y) = 9x + 5y passes through this set. What values of (x,y) give f(x,y) its maximum value? A)(-3, 2) B)(-3,

11. ## Pre-Calculus

Use a graphing calculator to write a polynomial function to model this set of data {(5,2) (7,5) (8,6) (10,4) (11, -1) (12 -3) (15,5) (16,9)} A) f(x) = 2x3 + 2.70x2 + 0.09x - 65.21 B) f(x) = 2x3 - 0.09x - 65.21 C) f(x) = 0.09x3 - 2.70x2 + 24.63x - 65.21 D)

12. ## Pre-Calculus

Identify the slope of the asymptotes of 5(y -1)2 - 20(x - 1)2 =64. A) 2 and -2 B) 64 and -64 C) 5 and -5 D) 0.25 and -0.25

13. ## Math

Which function could be the parent of y = 3|x| ? A)y = |x| B)y = 3x C)y = x3 D)y = 3 + x

14. ## Math

How can you sketch the graph y = |x - 2| ? A)Translate the graph of y = |x| two units up. B)Translate the graph of y = |x| two units down. C)Translate the graph of y = |x| two units left. D) Translate the graph of y = |x| two units right.

15. ## Trigonometry

Find tan2A when tanA = 1/3 and π

16. ## Math

Find cos2A when cosA = -3/5 and π/2

17. ## Trigonometry

Triangle PQR has vertices P(0, 1), Q(0, -4), and R(2, 5). Find the coordinates of R' to the nearest hundredth after rotating triangle PQR counterclockwise about the origin 45º.

18. ## Trigonometry

Suppose a smooth glass-top table is tilted slowly. The angle, A, at which a glass plate on the table begins to slide is 43º. Use the equation mg sin A = umg cos A to determine the coefficient of friction, u. A)0.43 B)0.22 C)0.90 D)0.93

19. ## Math

Suppose cosA = 12/13 with 0º≤A≤90º. Suppose also that sinB = 8/17 with 90º≤B≤180º. Find cos(A - B).

20. ## Math

Find all solutions to 7cosθ - 1 = 9cosθ.

21. ## Math

Find all solutions to 5cosθ = 3cosθ - 1.

22. ## Trigonometry

Solve tan2A - 2tanA = -1 for 0º≤A≤360º.

23. ## Math

Find all solutions to the equation 1 = 2cos θ.

24. ## Math

Solve 4cos^2A = 3cosA for 90º≤A≤180º. (Enter only the number.) Find A when 0º≤A≤90º and 3tan^2A = 2tanA + 1. (Enter only the number.)

25. ## Math

Two pilots take off from the same airport. Mason heads due south. Nancy heads 23º west of south. After 400 land miles, how far is Nancy from Mason’s route? Round your answer to the nearest tenth of a mile. (Enter only the number.)

26. ## Trigonometry

Suppose sin A = 12/13 with 90º≤A≤180º. Suppose also that sin B = -7/25 with -90º≤B≤0º. Find tan (A – B).

27. ## Math

Suppose sinA = 12/13 with 90º≤A≤180º. Suppose also that sinB = -7/25 with -90º≤B≤0º. Find cos(A + B).

28. ## Math

Select all the true statements about identities. A) You may use proven identities to prove other identities. B) An identity is true only for restricted values of the variables. C) You can prove an identity by graphing the side to the left of the equal

29. ## Math

Suppose sinA = 12/13 with 90º≤A≤180º. Suppose also that sinB = -7/25 with -90º≤B≤0º. Find cos(A - B).

30. ## Math

Rewrite the expression 2sinθ(cosθ)(cotθ) in terms of sine or cosine.

31. ## Math

Starting with the formula mg sin A = umg cos A, you can derive tan A = u to find the angle A of an incline and the coefficient of friction u of objects on the incline.

32. ## Math

A statue is erected on a triangular marble base. The lengths of the sides of the triangle are 12 feet, 16 feet, and 18 feet. What is the area of the region at the base of the statue to the nearest square foot? 169 ft2 144 ft2 143 ft2 94 ft2

33. ## Math

A local naturalist says that a triangular area on the north side of a pond is a turtle habitat. The lengths of the sides of this area are 15 meters, 25 meters, and 36 meters. Which expression gives the measure of the angle between the sides of the habitat

34. ## Math

A surveyor sights the top of a building with a handheld range finder. The top of the building is 72 feet 10 inches away. The angle of elevation is 57º. Find the distance from the surveyor to the building to the nearest foot.

35. ## Math

Charlie is late for the hot-air balloon rally. He stops his car 65 meters from a hot-air balloon already in flight. While Charlie watches the balloon ascend, he tilts his eyes up from 28º until he is watching at an angle of elevation of 66º. Find the

36. ## Math

Mr. Box lives on the fourth floor of a building and looks out of his window 46 feet above the sidewalk. A cat on the sidewalk below hears the window open and looks up at an angle of elevation of 75º. How far is the cat in feet from the edge of the

37. ## English Home Language

I'm Doing a english speech on propaganda my topic is "Women Should rule the world", can you help write by giving me main points to force on and what to say or make them think about or just write me the speech for me

1. ## Algebra

Do you go to Primavera?

posted on October 17, 2014
2. ## Trig

Are you sure it's negative?

posted on October 15, 2014
3. ## Trigonometry

Thank you guys! :)That really helped! I understand now!

posted on October 15, 2014
4. ## Math

How did you get 38? :)

posted on October 6, 2014
5. ## Math

A-36 B-38 C-39 D-40

posted on October 6, 2014
6. ## Math

Do I multiply tan75 times 46?

posted on October 6, 2014
7. ## Math

Yes.

posted on October 3, 2014