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Tutors Answer Your Questions about Trigonometry-basics (FREE)
Question 241233: PLEASE HELP ME TO SOLVE THIS PROBLEMS
A spoke of a wheel makes 32 revolutions while the wheel is going 425 feet. Find the diameter of the wheel to the nearest whole number.
THIs ARE THE POSSIBLE ANSWERS:
a)25 ft
b)5 ft
c)14.3 ft
Click here to see answer by checkley77(7035)   |
Question 241249: Points on the terminal sides of angles play an important part in the design of arms for robots. Suppose the robot's arm can change its length in addition to rotating about the origin in a coordinate plane. If the hand is initially at (12, 12), approximately how many degrees should the arm be rotated and how much should its length be changed to move the hand to (-17, 11)? Please round the first answer to the nearest whole number and the second answer to the nearest hundredth.
I tried and got 258 degrees but I don't think that is correct and I have no idea about what the length should be changed to.
Click here to see answer by Alan3354(6059)  |
Question 241174: I think my problem with these kinds of questions is that I’m having a hard time manipulating the secant, cosine, and so on. For instance, when trying to find the exact value for ‘sec 5π/12’; I know that sec=1/cos and I believe that I’m pretty much set up to use a sum difference identity but don’t think that I can just ...safetly assume that 1/cos=cos and I don’t know if I can honestly say how to change 1/cos into cos so I can use the identity. Also, I want to try my best to finish the rest on my own (that’s why I picked only one question). If anyone has any tips on handling Trig indentities and Trigonometry in general, I’d appreciate the advice. Thanks! ^_^
Click here to see answer by jsmallt9(590) |
Question 240790: PLEASE HELP ME SOLVE THIS CIRCULAR FUNCTION AND THEIR GRAPH:
theta is an angle in standard position with T(-20,-21)on terminal ray. Find cos(theta).
HERE ARE THE POSSIBLE ANSWERS:
a)-20/29
b)-21/29
c)21/29
Click here to see answer by Alan3354(6059) |
Question 240787: PLEASE HELP ME SOLVE THIS CIRCULAR FUNCTIONS AND THEIR GRAPH:
The angular velocity of point on a circle with radius of 13 feet is 14(pi) radians per second.Find the speed of the point on the circle.
HERE ARE THE POSSIBLE ANSWERS:
a)2.9ft/sec
b)3.4 ft/sec
c)571.5 ft/sec
Click here to see answer by Alan3354(6059) |
Question 240660: hi,
I am taking a course on N3 maths. Can you help me with the angle of inclination.
The question reads as follows:Determine th slope and angle of inclination of the line passing through points (-2;4) and (4;-1).
To get the andwer calculate m= y2-y1/x2-x1 thus:m=-(5/6)
I know m=tanθ so if the value of m=-5/6 how do i use my calculator to get the degree of the angle? The answer in the book is θ=140.2 degrees?
So how do I get the answer 140.2 degrees????
Click here to see answer by jsmallt9(590) |
Question 240660: hi,
I am taking a course on N3 maths. Can you help me with the angle of inclination.
The question reads as follows:Determine th slope and angle of inclination of the line passing through points (-2;4) and (4;-1).
To get the andwer calculate m= y2-y1/x2-x1 thus:m=-(5/6)
I know m=tanθ so if the value of m=-5/6 how do i use my calculator to get the degree of the angle? The answer in the book is θ=140.2 degrees?
So how do I get the answer 140.2 degrees????
Click here to see answer by vleith(1977) |
Question 238707: The geographic and magnetic north poles have different locations. Currently, the magnetic north pole is drifting westward through 0.0017 radian per year, where the angle of drift has its vertex at the center of the Earth. If this movement continues, approximately how many years will it take for the magnetic north pole to drift a total of 5 degrees?
Click here to see answer by jsmallt9(590) |
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