53 Answered Questions for the topic Radians

01/19/17

circles and angles (radians and degrees)

A cell phone tower sends a signal 3 miles in all directions. If you are driving on a raod that goes straight from 3.5 miles north of the tower to a location 4 miles west of the tower, during what... more
Radians Function Variable

01/11/17

Find the matching value for f

Find the matching value for f in the function below. The independent variable is in radians.   ƒ(π/4) = cos(cos-1x)
Radians

12/17/16

Trig Equation

Solve the trig equation -2sin2x=7cosx+2 for 0≤x<π (all angles are in radians)

if the radius of the circle in the figure is 20 cm and length equals 85 cm, what is the radian measure of angle

If the radius of the circle in the figure is 20 cm and length equals 85 cm, what is the radian measure of angle?

06/17/16

final exam review. Please tell me the steps to solve these questions. thanks!

*When its graphing questions just give me steps to determine the coordinates   1.Solve by graphing. x+2 = √(-6x - 12)   2.a)convert 101° to radians b) convert 4pi/3 to degrees     3. List... more

05/28/16

Solve for 2cos-sin^2x=cos^2x over the interval [0,2pi)

Solve for 2cosx - sin2x= cos2x over the interval [0,2pi)   1.) x=pi/6 and 11pi/6 2.) x=5pi/6 and 7pi/6 3.) x=2pi/3 and 4pi/3 4.) x=pi/3 and 5pi/3
Radians Angle Angles

03/27/16

How to figure out an angle in radians?

The rear wheels of a tractor have a diameter of 1.5 meters, and the front wheels have a diameter of 0.7 meters. The tractor travels a distance of 35 meters. What angle in radians must the wheels... more

03/27/16

A rotating water sprinkler makes one revolution every 15 seconds. The water reaches a distance of 5 metres from the sprinklers.

what is the arc length of the sector watered when the sprinkler rotates through 5pi/3?

Graphing Trig. Functions & Inverses

Evaluate In degrees:   1. Sin^-1 (-2pi)    2. arctan (- square root 3/3)   3. sin (cos^-1(- square root 3/2)      Evaluate in Radians   1. Arctan (-1)   2. cos^-1 (- 1/2) 

11/30/15

Find the exact value of sin

Find the exact value of: sin(75?)

11/19/15

Finding the radius of a circle

What is the radius of a circle in which an angle of 3 radians cuts off an arc length of 30cm?

11/19/15

Cosine trigonometry

Assume 0 ≤ θ ≤ πIf cos(θ) = 1, What is csc(θ)? cot(θ)?

11/19/15

What is the radius of a circle in which an angle of 3 radians cuts off an arc length of 30 cm?

What is the radius of a circle in which an angle of 3 radians cuts off an arc length of 30 cm?

11/19/15

Angles, Circles, Radians, Trig, Calc

Convert the following angles, assuming the radius of the circle is 1:a.) Convert 120? to radiansb.) Convert 2 radians to degrees

10/28/15

How long is the arc subtended by an angle of 4p/3 radians on a circle of radius 15cm?

How long is the arc subtended by an angle of 4π/3 radians on a circle of radius 15cm?

Write the complex number in

Standard a+bi form   4(cos (2pi/3)+isin(2pi/3))   Polar form with the angle in radians   -4+2i

Find parametric equations for the path of a particle that moves along the circle x2 + (y - 3)2 = 16 in the manner described.

 (Enter your answer as a comma-separated list of equations. Let x and y be in terms of t.)1)once around clockwise, starting at (4,3) 0≤t≤2pi2)three times around counter clockwise, starting at... more
Radians

11/24/14

If sqr(2)cosx-1=(1+sqr3)/2 and sqr(2)cosx+1=(1-sqr3)/2, find the value of cos4x

The answer is -1/2. How do I get this?
Radians

11/23/14

gravitron question

Chapter ProblemA popular ride at many theme parks is the Gravitron, which pins riders to the walls of the ride as it spins and then drops the ?oor to leave them suspended by friction and... more
Radians

11/23/14

1+sinx=cosx , [-pi,pi]

solve it using two different methods in radians please     
Radians Solve Equation

11/20/14

Solve the equation sin3x=0.5, [-pi,pi]

Is the answer pi/18, 13pi/18, -11pi/18, 5pi/18, 17pi/18 and -7pi/18?
Radians Radius

11/11/14

what is the value of r?

Matilda is planning a walk around the perimeter of Wedge Park, which is shaped like a circular wedge, as shown below. The walk around the park is 2.4 miles, and the park has an area of 0.25 square... more
Radians

11/02/14

Determine an approximate measure of theta in radians

Angle theta lies in the second quadrant and sinθ=7/25.   when i do arccos of -24/25 i get a different answer than when i do arcsin7/25 and only arccos of -24/25 is correct.   why is this?
Radians

11/01/14

State all the possible radian values of theta, to the nearest hundredth

cos(θ)=-5/13 where 0≤θ≤2π   i got 1.97 but how do i get the other answer in quadrant 3?   In general, how would i find out in all 4 quadrant?
Radians

07/04/14

Find the angle complementary to ; pie over 18

Choices are ;   5 pie over 9   17 pie over 18   4 pie over 9   9 pie over 18  

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