# Questions on Algebra: Trigonometry answered by real tutors!

Algebra ->  Algebra  -> Trigonometry-basics -> Questions on Algebra: Trigonometry answered by real tutors!      Log On

 Ad: Algebra Solved!™: algebra software solves algebra homework problems with step-by-step help! Ad: Algebrator™ solves your algebra problems and provides step-by-step explanations!

 Algebra: Trigonometry Solvers Lessons Answers archive Quiz In Depth

 Question 481747: two objects are directly in line with a cliff which stands 282ft. above the water. there angles of depression from the top of the cliff are 42 degree 25 minutes and 37 degress 15 minutes. how far apart are the objects and what are their horizontal distance from the cliff? Click here to see answer by mananth(12270)

 Question 482014: tan 5pi/3 and i need to determine the exact value of the expression without a calculator. I know how to work with the circle but i dont understand what to do if its not in one of the main angles. How am i supposed to find the answer? tan 5pi/3 is tan300 but its not a main angle what do I do? Click here to see answer by richard1234(5390)

 Question 482089: use a half angle identity to find the exact value of the expression sin 105 degrees Click here to see answer by lwsshak3(6469)

 Question 482088: find the exact value of the expression sin 165 degrees Click here to see answer by lwsshak3(6469)

 Question 482086: find the exact value of the expression cos 255 degrees Click here to see answer by lwsshak3(6469)

 Question 482144: how would i show that sin (-θ) = -sin θ Click here to see answer by lwsshak3(6469)
 Question 482144: how would i show that sin (-θ) = -sin θ Click here to see answer by jim_thompson5910(28504)

 Question 482166: How do I prove: sin x/1 - cos x = csc x + cot x Click here to see answer by mananth(12270)

 Question 482180: I have such a hard time with the square root problems you you could help i would be soo happy. It says Solve and check following equation. show your work. please? 1. √2x=-12 check: thank you Click here to see answer by stanbon(57243)

 Question 482355: Please help: Determine whether A = B, A ⊆ B, B ⊆ A, A ⊂ B, B ⊂ A or if none of these answers applies. Set A is the set of all exercise classes offered at Gold’s Gym. Set B is the set of aerobic exercise classes offered at Gold’s Gym Click here to see answer by Theo(3458)

 Question 482661: How to express sec theta in terms of cot theta Click here to see answer by Edwin McCravy(8882)

 Question 482685: Can you give an example of each of the following for real life use ratio proportion direct variation inverse variation joint variation rational equation trigonometric function right triangle law of sines law of cosines vector system of linear equations determinant quadratic equation radian factoring completing the square quadratic formula phasor complex number exponet equation logarithmic equation decimal binary octal hexadecimal rectangular coordinate polar coordinate plane geometry Click here to see answer by stanbon(57243)

 Question 482787: Trigonometry problem hard to try and explain to you without the picture but I'll do my best There's a right triangle ABC - where C is 90 degree the distance between C and B is 300 and the distance between and A and C is 100. There's half a cirle inside the triangle - what is the diameter of the circle (the other half of the circle is outside the triangle). If you wish to have a picture of this, let me know I can send it. thanks Louise Click here to see answer by Alan3354(30983)

 Question 483081: Determine the value(s) of k so that the point (-4,5) is on the line k^2(x)-ky=6. I seem to keep getting imaginary answers. Click here to see answer by jim_thompson5910(28504)

 Question 483080: Use interval notation to state the domain of the function: f(x)= 1/(X+5)(SQUARE ROOT OF X^2 -4) Click here to see answer by lwsshak3(6469)

 Question 482856: Let theta be an angle in quadrant 2. such that cot theta= -5/12. Find the exact values of Sin theta and Sec theta Click here to see answer by lwsshak3(6469)

 Question 482513: A sector has an area of 50cm^2 and an arc length of 4 cm. Find its radius and central angle in radians. Click here to see answer by lwsshak3(6469)

 Question 483253: Solve the equation below for z. y2 + 3yz - 8z - 4x = 0 Click here to see answer by mananth(12270)

 Question 483475: Find the remaining trigonometric functions of θ if csc(θ) = 17/8 and cos(θ) < 0. Click here to see answer by stanbon(57243)

 Question 483485: exact value without a calculator(all numbers are degrees) sin40+sin130+sin220+sin310 Click here to see answer by stanbon(57243)

 Question 483793: Hi I have another question I would like to verify my answer to: In Δ ABC, find the value of ∠C, if a = 5.7 m, b = 3.9 m, and c = 7.7 m. answer : C=105 degrees Click here to see answer by Edwin McCravy(8882)

 Question 484186: let theta be an angle in quadrant 4 such that cos theta = 7/8. find exact values of csc theta and cot theta Click here to see answer by stanbon(57243)

 Question 484085: Solve 2cos x+2cos 2x=0 on the interval [0,2pi) Click here to see answer by Joker(6)

 Question 484459: cos 0 = (squareroot 3) / 2 0= Click here to see answer by chessace(471)

 Question 484457: S3 3 x 2dx= (it doesn't look like an S its more of a squiggle, so if you you could explain that as well thank you) Click here to see answer by chessace(471)

 Question 484815: A Wheel makes 32 revolutions per minute. Find in radians the angle through which the wheel turns in 3 seconds. How long will it take to turn through 25 degree? Click here to see answer by lwsshak3(6469)

 Question 484942: = -90° What is the reference angle. Find the quadrants in which the angles lie. show your steps Click here to see answer by Edwin McCravy(8882)

 Question 485290: Round all answers to the nearest hundredth. Solve ∆ABC A= 66* B=95* C=19* a=11 b=12 c=4 thank you Click here to see answer by Alan3354(30983)

 Question 486636: Expand and simplify. 1) sigma notation: n=0; top of sigma = 4; to the right - (n^2/2) 2) sigma notation: n=1; top of sigma = 3; to the right - (1/n!) Click here to see answer by solver91311(16868)

 Question 486694: Two aircraft leave simultaneously from an airport, one flying due north and the other due east. The northbound aircraft averages a speed of 100 miles per hour fater than the eatbound aircraft. After 3 hours, the aircraft are 1500 miles apart. Find the average speed of each aircraft. Click here to see answer by mananth(12270)

 Question 486941: Suppose y varies jointly as x and z and y=36, when x=1.2 and z=2. Find y when x=0.4 and z=3. How would you solve this problem ? Click here to see answer by John10(245)