Friday
October 24, 2014

Posts by Teekay


Total # Posts: 38

Trigonometry
Solve the equation cos2θ = 1/2sinθ 0º≤θ≤90º. (Hint: Graph each side of the equation and determine where the graphs intersect.)
October 23, 2014

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...
October 21, 2014

Trigonometry
Find tan2A when tanA = 1/3 and π<A<3π/2. A) 4/5 B) 5/4 C) 3/4 D) 3/5
October 20, 2014

Math
Find cos2A when cosA = -3/5 and π/2<A<π. A) -24/25 B) -7/25 C) 7/24 D) 24/7
October 20, 2014

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.
October 17, 2014

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.
October 17, 2014

Algebra
Do you go to Primavera?
October 17, 2014

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
October 17, 2014

Math
Suppose cosA = 12/13 with 0º≤A≤90º. Suppose also that sinB = 8/17 with 90º≤B≤180º. Find cos(A - B).
October 17, 2014

Math
Find all solutions to 7cosθ - 1 = 9cosθ.
October 16, 2014

Math
Find all solutions to 5cosθ = 3cosθ - 1.
October 16, 2014

Trigonometry
Solve tan2A - 2tanA = -1 for 0º≤A≤360º.
October 16, 2014

Math
Find all solutions to the equation 1 = 2cos θ.
October 16, 2014

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.)
October 15, 2014

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.)
October 15, 2014

Trigonometry
Thank you guys! :)That really helped! I understand now!
October 15, 2014

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).
October 15, 2014

Math
Suppose sinA = 12/13 with 90º≤A≤180º. Suppose also that sinB = -7/25 with -90º≤B≤0º. Find cos(A + B).
October 14, 2014

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 sign, graphing the side ...
October 14, 2014

Math
Suppose sinA = 12/13 with 90º≤A≤180º. Suppose also that sinB = -7/25 with -90º≤B≤0º. Find cos(A - B).
October 14, 2014

Math
A simplified version of the expression 2sinθ (cos θ)(cotθ) is
October 13, 2014

Math
Rewrite the expression 2sinθ(cosθ)(cotθ) in terms of sine or cosine.
October 13, 2014

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.
October 13, 2014

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.
October 13, 2014

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
October 10, 2014

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 that measure 15 ...
October 10, 2014

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.)
October 9, 2014

Math
How did you get 38? :)
October 6, 2014

Math
A-36 B-38 C-39 D-40
October 6, 2014

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.
October 6, 2014

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 vertical ...
October 6, 2014

Math
Do I multiply tan75 times 46?
October 6, 2014

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 building? (Enter only ...
October 6, 2014

Math
Yes.
October 3, 2014

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.)
October 3, 2014

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 ground? (Hint: Sketch ...
October 3, 2014

Trig
Are you sure it's negative?
September 17, 2013

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
February 9, 2012

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