Questions on Algebra: Trigonometry answered by real tutors!

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 Algebra: Trigonometry Solvers Lessons Answers archive Quiz In Depth

 Question 448478: Find the amplitude, period, and phase shift. y = 10*cos(½x) Click here to see answer by Edwin McCravy(8999)

 Question 448490: find the period, range, and amplitude of the cosine function y=(3)/(2)cos(t/2) Click here to see answer by lwsshak3(6742)

 Question 448514: find the dot product of vector v and vector w if: v=2i-3j w=i-j Click here to see answer by jim_thompson5910(28696)

 Question 448516: sin(Arccos(-2/5) I need help finding the wrapping function of (-2/5) I am not quite sure on how to find the denominator of 5. Our teacher only taught us 2,3,4,6,8, and 12. Thank you for your help! Click here to see answer by Alan3354(31487)

 Question 448191: y= 2tan(1/2)*with a theta sign* the problem tells me to graph it thanks :) Click here to see answer by lwsshak3(6742)

 Question 448770: A kite is held by a taut string pegged to the ground. THe string is 80 feet long and makes a 38 degree angle with the ground. Find the vertical distance from the ground to the kite. Click here to see answer by mananth(12270)

 Question 448838: How can I find the exact value of Sin 480 degrees? Thanks Click here to see answer by lwsshak3(6742)

 Question 448889: How do I solve the following identity: tan(x+pie/4)=1+tanx/1-tanx Click here to see answer by lwsshak3(6742)

 Question 448722: find the exact value of sec theta for angle theta in standard position if the point (-5,-4) lie on it;s terminal side. Click here to see answer by lwsshak3(6742)

 Question 448717: the line y=3x creates an acute angle theta when it crosses the x axis. Find the exact value of sin theta. Click here to see answer by lwsshak3(6742)

 Question 448715: A wheel has a radius of 3 feet. As the wheel turns, a rope connected to a five kilogram weight winds onto the wheel, causing the weight to move. If the wheel turns 135 degrees, to the nearest food, how far does the weight move? Click here to see answer by lwsshak3(6742)

 Question 449093: A baseball diamond is a square 90ft on a side. The pitcher's mound is 60.5ft from home plate. How far it from the mound to first base? Click here to see answer by rwm(914)
 Question 449093: A baseball diamond is a square 90ft on a side. The pitcher's mound is 60.5ft from home plate. How far it from the mound to first base? Click here to see answer by richard1234(5390)

 Question 449095: what is the value of the following function? cos(130°)cos(10°) + sin(10°) sin(130°). Click here to see answer by lwsshak3(6742)

 Question 449192: Find the reference angle for -144 degrees. I'm coming up with 504 degrees, but I think I'm missing a step. Click here to see answer by stanbon(57940)

 Question 449193: Find x, the angle of depression from the top of a lighthouse that is 152ft above water level to the waterline of a ship 868ft off shore. Round your answer to the nearest hundredth of a degree. Click here to see answer by stanbon(57940)

 Question 449202: A circle has a radius of 5.5yd. A sector of the circle has a central angle of 3pie/4 radians. Find the area of the sector. Do not round any intermediate computations. Round your answer to the nearest tenth Click here to see answer by lwsshak3(6742)

 Question 449320: Prove that it is an identity 1) tan (1/2) A = csc A - cot A Click here to see answer by Gogonati(817)

 Question 449325: solve for theta in teh intervals 0 - 360 sin x cos x = cos x Click here to see answer by Gogonati(817)

 Question 449323: Express as a simplest form [(sin A/cos A) / (cos A/sin A)] + [(cos A/sin A)/(sin A/cos A)] Click here to see answer by MathLover1(6801)

 Question 449364: Find all solutions of the equation in the interval [0,2pi]. (2cosθ+sqrt3)(cscθ+1)=0 Write your answer in radians in terms of pi . If there is more than one solution, separate them with commas. Click here to see answer by lwsshak3(6742)

 Question 449411: triangles ABC is formed by the intersection of the lines y= x, y= -2x, y= -4 solve for triangle ABC Click here to see answer by lwsshak3(6742)

 Question 449356: The monthly cost (in dollars) of a long-distance phone plan is a linear function of the total calling time (in minutes). The monthly cost for 34 minutes of calls is \$12.47 and the monthly cost for 51 minutes is \$14.00. What is the monthly cost for 47 minutes of calls? Click here to see answer by lwsshak3(6742)

 Question 449468: The polynomial function f(x) is defined by f(x)=-4x^4+9x^3+2x^2-7x-2. Use a graphing calculator to find all the points where there is a local minimum. Round to the nearest hundredth. Click here to see answer by lwsshak3(6742)

 Question 449582: Find all solutions of the equation in the interval [0,2pi) . cos pi=0.7125 If there is more than one solution, separate them with commas. Do not round any intermediate computations, and round your answer(s) to the nearest hundredth. Click here to see answer by valnadam(5)
 Question 449582: Find all solutions of the equation in the interval [0,2pi) . cos pi=0.7125 If there is more than one solution, separate them with commas. Do not round any intermediate computations, and round your answer(s) to the nearest hundredth. Click here to see answer by stanbon(57940)

 Question 449632: how do you find the cotangent of 36 degrees? Click here to see answer by jim_thompson5910(28696)

 Question 449709: if an object is projected upward with an initial velocity off 64 ft per sec from a height of 336 feet then its height t sec after it is projected is defined by the equation h= -16t^2 + 64 t + 336. how many sec after it is projected will it hit the ground? Click here to see answer by jorel1380(2518)
 Question 449709: if an object is projected upward with an initial velocity off 64 ft per sec from a height of 336 feet then its height t sec after it is projected is defined by the equation h= -16t^2 + 64 t + 336. how many sec after it is projected will it hit the ground? Click here to see answer by lwsshak3(6742)

 Question 449672: Cos theta is -0.6 and theta is in quadrant III, find sin (1/2) theta. Click here to see answer by lwsshak3(6742)

 Question 449671: If sin x = -(4/5) and x is in quadrant IV, find cos (1/2) x Click here to see answer by lwsshak3(6742)

 Question 448794: Use the addition identity to find the exact value for sin 105°. Show the work. Click here to see answer by lwsshak3(6742)

 Question 449781: What is the degrees, to the nearest tenth of a degree, of the angle who measure is 2.5 radians? Click here to see answer by Alan3354(31487)

 Question 449865: how do you know if it is a degrees? Click here to see answer by stanbon(57940)

 Question 449873: How do I convert radians to degrees? Is it pi/180 or 180/pi? I get them confused! Thanks Click here to see answer by stanbon(57940)
 Question 449873: How do I convert radians to degrees? Is it pi/180 or 180/pi? I get them confused! Thanks Click here to see answer by tinbar(128)

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