# Questions on Algebra: Trigonometry answered by real tutors!

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 Algebra: Trigonometry Solvers Lessons Answers archive Quiz In Depth

 Question 487970: how do you solve tanx/x i can't quite figure it out. Click here to see answer by richard1234(5390)

 Question 488076: The terminal side of an angle theta in standard position coincides with the line 3x+y=0 in Quadrant II. Find csc theta to the nearest thousandth. Click here to see answer by stanbon(57967)

 Question 488213: A cam is in the shape of a circular sector. What is the perimeter of the cam if it has a radius of 1.875 cm and the central angle is 165.58 degrees? Please help I suck at word problems Click here to see answer by Theo(3504)

 Question 488238: sin 2x + cos 60 = 0, 0 < x < 360. i have been able to find out that sin inverse of -1/2 is -30, but how do i find answers in the 3rd and fourth quadrant for 2x?? then i can find x. my answers are coming wrong, and i can apply no suitable rule. please help, and show working if possible. Click here to see answer by stanbon(57967)
 Question 488238: sin 2x + cos 60 = 0, 0 < x < 360. i have been able to find out that sin inverse of -1/2 is -30, but how do i find answers in the 3rd and fourth quadrant for 2x?? then i can find x. my answers are coming wrong, and i can apply no suitable rule. please help, and show working if possible. Click here to see answer by Theo(3504)

 Question 488390: Use calculator to find the following ratio. Round answer to the nearest ten thousandth. sec 3(pi)/8 Click here to see answer by rfer(12730)

 Question 488421: what is the exact value of the expression of 11 sqrt 8 +6 sqrt 12 -5 sqrt 2 Click here to see answer by stanbon(57967)

 Question 488395: Find an exact solution to the equation below so that 0 < theta < pi. (1 + tan(theta))/sin(theta)= 0 theta = Click here to see answer by lwsshak3(6761)

 Question 488384: Find an exact solution to the equation below so that 0 < θ < π/3. 1 = sqrt(3)tan(3θ) θ = _____________________? Click here to see answer by lwsshak3(6761)

 Question 488372: Find an exact solution to the equation. 1= 8 cos(3 x + 1) - 3 x = _________________? Click here to see answer by lwsshak3(6761)

 Question 488194: 4sec(180)-2sin^(2)(270) Don't know where to start? Maybe convert sec to 1/cos180? example: 4(1/cos180)-2sin^2(270) ??? Click here to see answer by lwsshak3(6761)

 Question 487667: A cam is in the shape of a circular sector. What is the perimeter of the cam if it has a radius of 1.875 cm and the central angle is 165.58 degrees? Please help I suck at word problems Click here to see answer by lwsshak3(6761)

 Question 490082: a 15-cm piece of wood is cut into two pieces. one piece is 7cm longer than the other. how long are the pieces? Click here to see answer by stanbon(57967)

 Question 490085: seven more than four times a number is the same as five less than eight times the number. what is the number? Click here to see answer by stanbon(57967)

 Question 488945: Please help me solve this question: Villages A,B,C and D are such that B is 4km due east of A, C is 3km due south of B and D is 4km South50degreeWest from C. Calculate the distance and bearing of A from D. Click here to see answer by lwsshak3(6761)

 Question 488823: Find the area of a sector of a circle having radius and central angle. radius= 191 in central angle= 86.42 degrees Area of a sector=? my answer was 157634401/18000.. Click here to see answer by lwsshak3(6761)

 Question 488005: Express -15° as an exact radian measure (as a fraction of p in lowest terms) Click here to see answer by lwsshak3(6761)

 Question 485230: what is the reference angle for 17 pi/12? Click here to see answer by lwsshak3(6761)

 Question 490915: I really need your help with finding an exact value while using an reference angle! Expression: cos 13pi/ 6 I thought the answer would be pi/6 Click here to see answer by Alan3354(31529)

 Question 491358: Evauluate: (sin 42 / cos 48) * (cos 45 / sin 90) *cot 5 *tan 85 I worked out this sum and got the following answer (tan^2 85)* cos 45 Click here to see answer by Alan3354(31529)

 Question 491735: ALRIGHT, so I understand cos23pi/6 can be solved using the unit circle but I don't thoroughly understand HOW to count it to find the answer. What I mean by this is: do I start on 30 degrees, which is pi/6, and count every 30 degrees until I get to 23? ugh! I'm so confused, PLEASE help me! I will be most grateful toward you! Click here to see answer by scott8148(6628)
 Question 491735: ALRIGHT, so I understand cos23pi/6 can be solved using the unit circle but I don't thoroughly understand HOW to count it to find the answer. What I mean by this is: do I start on 30 degrees, which is pi/6, and count every 30 degrees until I get to 23? ugh! I'm so confused, PLEASE help me! I will be most grateful toward you! Click here to see answer by lwsshak3(6761)

 Question 491355: If sin(a+2b)=root 3 /2 and cos(a-b)=1/2,find a and b. Click here to see answer by lwsshak3(6761)

 Question 492115: a circle has a radius of 7 kilometers. A sector in this circle has an arc length of 18.2 kilometers. Find the centeral angle θ, in degrees, for this sector Click here to see answer by ankor@dixie-net.com(15746)

 Question 492294: By using the even-odd properties to find the exact value of each expression. sin(-135(degrees)) sec(-pi) tan( (-pi) / (3) ) I apologize for three questions but they are all related. Click here to see answer by lwsshak3(6761)

 Question 492290: How do I do this: Given sin (theta) = (-15/13) and (theta) is in quadrant 3, find the exact value of each of the remaining trig functions of (theta). Click here to see answer by lwsshak3(6761)

 Question 492328: How do you solve the following problem: If 90degrees < 0 < 180degrees and sin 0 = 10/26, then cos 0 = Click here to see answer by lwsshak3(6761)

 Question 492287: How would I find the exact value of sin (6pi) ? and cos (-11pi/2) ? Thank you Click here to see answer by lwsshak3(6761)

 Question 492285: Thank you for your time Here is the question: Let ( (-2/sqrt(5)), (1/sqrt(5)) ) be the point on the unit circle that corresponds to a real number, t. Find the exact values of the six trigonometric functions of t. Click here to see answer by lwsshak3(6761)

 Question 491741: find all solutions for x in the interval (0,2pi) for the equation sin x = -.9589 Click here to see answer by lwsshak3(6761)

 Question 493016: Find all t in the interval [0, 2π] satisfying (cos t)2 + 4 cos t + 3 = 0. (Enter your answers as a comma-separated list.) Click here to see answer by Alan3354(31529)

 Question 493736: A circle has a radius of 7ft. find the central angle in degrees for a sector with area of 50ft^2. Click here to see answer by MRperkins(300)

 Question 493646: Find all t in the interval [0, 2π] satisfying (cos t)2 − 6 cos t + 5 = 0. Click here to see answer by lwsshak3(6761)