8,485 Answered Questions for the topic trigonometry

Trigonometry Precalculus

20h

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

Trigonometry Precalculus

1d

#### Precalc : Find the smallest positive solution of sin2xcos3x = 1-sin3xcos2x

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...
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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...
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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

#### 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...
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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...
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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...
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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

7d

#### Let v= -4i -6 j . Find a vector that is twice the length and points in the opposite direction of v.

#### 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...
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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...
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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))

#### 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...
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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...
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Trigonometry

9d

#### explain how the equation for the unit circle is derived.

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