8,485 Answered Questions for the topic trigonometry

Trigonometry Precalculus

20h

Precalc: Prove the Identity: sin2x/1-cos2x = 2csc2x-tanx

Trigonometry Calculus Precalculus

4d

Trig identities

Suppose that cos𝑥=8/17 and 𝑥 are in the fourth quadrant and that sin𝑦=24/25 and 𝑦 is in the second quadrant. Which trig identity would you use for sin(x + y)?Which trig identity would you use for... more
Trigonometry Math

4d

In trigonometric functions, is horizontal translation affected by y-axis reflection?

f(x) = a( sin bx +c) +df(x) = -(sin(x-pi/2))b = 1, c = -pi/2horizontal translation is -c/|b| = -(-pi/2)/|1| = pi/4so,the horizontal translation is pi/4, is it to the right or to the left?I know... more
Trigonometry

4d

Trigonometry i think

A flag pole is 30 ft high. It is casting a 40 ft shadow. How many inches are there from the top of the flag pole to the end of the shadow?A)1200B)600C)110D)70
Trigonometry Math Calculus

5d

supply function

The supply function for a product is given by p=75+100√(4x+5), where xx is the number of units supplied and p is the price in dollars. If the price is increasing at a rate of $1 per month, at what... more
Trigonometry Math Calculus Precalculus

5d

ship nautical miles problem unsolveable

At noon, ship A is 10 nautical miles due west of ship B. Ship A is sailing west at 15 knots and ship B is sailing north at 17 knots. How fast (in knots) is the distance between the ships changing... more
Trigonometry Math Calculus Precalculus

5d

cop car question

A police car is located 30 feet to the side of a straight road.A red car is driving along the road in the direction of the police car and is 210 feet up the road from the location of the police... more
Trigonometry Math Precalculus

5d

If sina =-7/25 and cosb = 8/17 with 270 < a,b < 360 find the value of sin(a+b)

is the answer -416/425?
Trigonometry

6d

Find the exact value of the trigonometric function given that sin u = 7/25 and cos v = − 8/17 . (Both u and v are in Quadrant II.) csc(u − v)

find the exact value of the trigonometric function csc(u-v) given that sin(u)=7/25cos(v)=-8/17
Trigonometry Precalculus

6d

Find the missing values by solving a parallelogram.

Find the missing values by solving a parallelogram. (The lengths of the diagonals are given by c and d. Round your answers to two decimal places.)a=b=21c=42d=38𝜃= °𝜑=
Trigonometry

6d

Use an Addition or Subtraction Formula to find the exact value of the expression cos(41pi/12)

Use an Addition or Subtraction Formula to find the exact value of the expression: cos(41pi/12)
Trigonometry Math Geometry

8d

Find endpoint of two vectors if they are perpendicular.

The question states: If A = (10,7) and B = (0, -8), find point D, which is on the x-axis, so that the vector AD is perpendicular to the vector BD.The only information I have is that if two vectors... more
Trigonometry

8d

Hyperbolas, find width of cooling tower.....

The sides of a nuclear power plant cooling tower form a hyperbola. The diameter of the bottom of the tower is 291 feet. The smallest diameter of the tower is 182 feet which is 419 feet above the... more
Trigonometry

8d

Verify the Identity (1 − cos(𝛽))(1 + cos(𝛽)) = 1 /csc^2(𝛽)

Verify the identity (1 − cos(𝛽))(1 + cos(𝛽)) = 1 /csc^2(𝛽)It wants me to verify by expanding the right sideI got to (1-cos(𝛽))(1+cos(𝛽))=1-(cos^2(𝛽))
Trigonometry Math Geometry

9d

Rotating a point around another using vectors. - method is wrong?

The question: On what coordinates will point B = (7,5) land if it is rotated around point A = (0,0) by 110 degrees?My workings out gave me the answer B will land on point (-7.09, 4.87). I got this... more
Trigonometry

9d

determine the approximate vale of each trigonometric ratio. round to four decimal places, justify sign used for each ratio

a. cos 2.51b. csc (-125degrees)
Trigonometry

9d

determine the exact value for each of the following trigonometric ratios

a. sin 5π/3 b. cos 5π/3c. tan 5π/3 justify answer for c
Trigonometry

9d

given that P (θ) = (1/2, -√ 3/2) determine the following

a. which quadrant does θ terminate? b. determine the value of the central angle θ for 0 ≤ θ < 2π.c. determine the values of the central angle θ for -2π ≤ θ < 4π. how is that related to... more
Trigonometry

9d

explain how the equation for the unit circle is derived.

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