# Questions on Algebra: Trigonometry answered by real tutors!

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 Algebra: Trigonometry Solvers Lessons Answers archive Quiz In Depth

 Question 229280: solve the following equation for the given value of x: y= cos x; for x = 4 pie Click here to see answer by rfer(12660)
 Question 229280: solve the following equation for the given value of x: y= cos x; for x = 4 pie Click here to see answer by Alan3354(30993)

 Question 229350: i need help rewriting the expression as a square of a binomial x^2-38x+361 Click here to see answer by checkley77(12569)

 Question 230382: How do I write a model for the given sunset information using time (t) as a function of days (d) if a year has 365 days. Date Day Sunrise Sunset Mar 20 80 6:14 6:22 June 20 172 4:44 7:38 Sept 22 266 5:57 6:06 Dec 21 356 7:25 4:52 Click here to see answer by stanbon(57354)

 Question 230555: what is the sine of angle A the triangle is a right angle triangle with a hypotenuse of 10 , opposite 6, and adjacent 8 angle A is between 10 and 8... Click here to see answer by chibisan(131)

 Question 230621: If 0 < x < pi/2 and tanx = 15/8, find cos2x. Click here to see answer by jsmallt9(3296)

 Question 230618: How do I solve for x when cos^2 x = sin x? Click here to see answer by scott8148(6628)

 Question 230712: the hypotenuse of a right triangle PQR is 16 feet long. the sine of angle P is 3/5, about how many feet long is QR ? TRIANGLE P |. |..... |....... |......... |........... |............. |------------- R Q Click here to see answer by stanbon(57354)

 Question 230729: Hello, I need help simplifying this trigonometry function: Thank you~ Click here to see answer by stanbon(57354)

 Question 230798: Hi, I have a "Trig Identity" problem that I'm to verify. I know they are equal by substituting in a value, but I don't know how to approach it. I thought using a conjugate was the way, but it got me nowhere. Here is the problem: (cotX * cosX)/(cotX + cosX) = (cotX - cosX)/(cotX * cosX) Thank you, Lynn Click here to see answer by Alan3354(30993)

 Question 230896: Please help me with this problem: Carefully describe how to manipulate the graph of y = sin t to get the graph of y = 3sin (4t - pi/6) - 5. Thank you! Cindy Click here to see answer by Alan3354(30993)

 Question 231164: The terminal side of angle theta in standard position lies on the given line in the given quadrant. Find sin theta, cos theta and tan theta. 2x + 3y=0; quadrant IV Click here to see answer by jsmallt9(3296)

 Question 231308: p=2w+2l. l=3w. what is p in terms of l? Click here to see answer by stanbon(57354)

 Question 231967: Use the sum or difference identities to find the exact value of sin 105 degrees. Click here to see answer by Alan3354(30993)

 Question 232030: find a polynomial function of degree 3 with the given numbers as zeros. 1+4i,1-4i,-1 Click here to see answer by Alan3354(30993)

 Question 232037: list all possible rational zeros of the function f(x)= 3x^3-x^2+6x-9 Click here to see answer by stanbon(57354)

 Question 232033: Suppose that a polynomial function of degree 4 with rational coeficients has the given numbers as zeros. find the other zero(s). -2,3,4,1-i Click here to see answer by stanbon(57354)

 Question 232041: determine the amplitude,period, and phase shift of each function. then graph one period of the function. y=3sin(2x - pi/2) Click here to see answer by stanbon(57354)

 Question 232074: FIND TAN OF THETA AND COT OF THETA IF SEC OF THETA = 0 AND SIN OF THETA < 0 Click here to see answer by Alan3354(30993)

 Question 232058: Find sec theta if tan theta=1/4 and 180Degrees< theta <270degrees. Thankyou!! Click here to see answer by chibisan(131)

 Question 231972: Use the identities to find the exact value of the remaining trigonometric functions if sin x = -5/13 and tan x = -5/12. Click here to see answer by chibisan(131)

 Question 232305: 1.state the general solution to the equation sec2x=-3 2. use an algebraic approach to solve the equation cos3x=-1/2 Click here to see answer by stanbon(57354)

 Question 233229: How do you find the angle PRT when Angle feda is equal to thirty degrees and hypotenuce is four Click here to see answer by Alan3354(30993)

 Question 233386: A car travels along a straight road, heading east for 1 h, then traveling for 30 min on another road that leads northeast. If the car has maintained a constant speed of 40 mi/h, how far is it from its starting position? Round your answer to 2 decimal places. Click here to see answer by jsmallt9(3296)

 Question 233384: Find the angle θ. (Use either the Law of Sines or the Law of Cosines, as appropriate.) (Round your answer to one decimal place.) a = 12, c = 6, angleC=25 degrees. find thetha in degrees Click here to see answer by stanbon(57354)

 Question 233423: A regular cyclical polygon is inscribed inside a circle of radius 5cm. Find the length of one side. This question is from the chapter: Sine and cosine ratios.Please help me solve my question. It is really urgent. Thankyou very much indeed. Click here to see answer by Alan3354(30993)

 Question 233387: Points A and B are separated by a lake. To find the distance between them, a surveyor locates a point C on land such that angleCAB = 48.6°. He also measures CA as 316 ft and CB as 527 ft. Find the distance between A and B. Round your answer to the nearest foot. (Note: angleABC is an acute angle.) Click here to see answer by Theo(3464)