MATH
posted by gf .
Please help me with these problems. Work and answer is appreciated! :) thanks.
1. Find on the interval theta is greater than or equal to 0 and less than 2pi; then find the general solution:
5tantheta+1=2.89
16cos^2theta6=3
6sin^2theta+sintheta=2
costheta=.84
2tanx=7
2.Find all solutions to 5cos(2pi x)=3 on the interval of x is greater or equal to 0 and less than or equal to 3.
3.Find # of solutions to cos(4x)=.724 on the interval of theta is greater or equal to 0 and less than 2pi
4.The angle of elevation from an airport to plane is 5 degrees. The altitude of the plane is 25000 ft. What is the distance from the plane to the airport?
5.A satellite launched into space reaches its farthest pt north of the equator 30 min after the launch. It reaches its farthest south of equator, distance of approx 2000 km, 90 min after that. If it takes the satellite 3 hours to orbit the earth, find an equation to model the satellites distance from the equator. (t=time)
PLEASE HELP URGENT

It is not the function of this webpage to simply do the homework or assignments for students.
It sure looks like that is what you want.
These look like routine questions for a standard Calculus course.
I will do #2 the way I would do it, follow this procedure to do the rest.
5cos(2pi x)=3
cos(2pi x)=3/5 = .6
so the angle (2pi x) is either in quadrants I or IV according to the CAST rule
set your calculator to radians
then (2pi x) = .9273 OR (2pi x) = 2pi.9273 = 5.358
then x = .14758 or x = .8524
Now the period of your original function is 2pi/2pi = 1
so you can get addional answers by adding the period of 1 to any of your answers.
So in the interval from 0 to 3
x = .14758, 1.14758, 2.14758, .8524
(I tested all of them, they work) 
I don't get percentage.
Respond to this Question
Similar Questions

Math
1)Find cos theta if sin theta=3/5 and 90 degrees<theta<180 degrees. A)4/5 B)4/5 C)square root of 34/5 D)square root of 34/5 I chose A 2)Simplify:1csc^2theta/cot^2theta A)1 B)1 C)tan^2theta D)1/sin^4theta I chose C 3)Simplify:5(cot^2thetacsc^2theta) … 
Math
There are no typos and no work b/c I don't know how to do them. Thanks. 1)Find cos theta if sin theta=3/5 and 90 degrees<theta<180 degrees. A)4/5 B)4/5 C)square root of 34/5 D)square root of 34/5 I chose A 2)Simplify:1csc^2theta/cot^2theta … 
math
There are no typos and no work b/c I don't know how to do them. Thanks. 1)Find cos theta if sin theta=3/5 and 90 degrees<theta<180 degrees. A)4/5 B)4/5 C)square root of 34/5 D)square root of 34/5 I chose A 2)Simplify:1csc^2theta/cot^2theta … 
trig
e.g. tan 315 = 1, does that work in our equation ? 
trig
If sin theta = x and pi/2 is less than or equal to theta less than or equal to pi/2, find sin 2theta and cos 2theta in terms of x. Is it alright if I recommend you to my classmates tommorow? 
trig
given that 1/2pi<theta<pi and sin theta=1/5, use appropriate trigonometric formulas to find the exact values of the following (i) cos(2theta) (ii) cos theta (iii) sin(2theta) 
PURE MATHEMATICS
1. The complex number 'a' is such that a^2=512i use an algebraic method to find the two possible values of 'a' 8. The complex number z is given by z=cosTheta + isinTheta where 1/2pi< or equal to Theta less than or equal to 1/2pi. … 
Math
sin theta = 8/17 and theta is in the second quadrant. Find sin(2theta),cos(2theta),tan(2theta) exactly sin(2theta) cos(2theta) tan(2theta) 
Math
sin theta = 8/17 and theta is in the second quadrant. Find sin(2theta),cos(2theta),tan(2theta) exactly sin(2theta) cos(2theta) tan(2theta) sin(2theta) would it be 2 x (8/17) cos(2theta) would be 2 x (15/17) tan(2theta) would be 2 x … 
Trig
Solve each equation for exact solutions over the interval [0,360)where appropriate. Round approximate solutions to the nearest tenth degree. Sin^2Theta=Cos^2Theta+1 My Work: Using double angle Identity I subtract 1 to other side therefore: …