# Questions on Algebra: Trigonometry answered by real tutors!

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 Algebra: Trigonometry Solvers Lessons Answers archive Quiz In Depth

 Question 619100: please help me: in general. how do you know what direction to add or sub tract to find the ref angle: example what is the ref angle of -6pie/5 or 264 degrees. i feel subtracting 264-360 might make this one 96? Click here to see answer by scott8148(6628)

 Question 618714: find the period for f(x)= -9 sin 5x Click here to see answer by lwsshak3(6463)

 Question 619215: I am using a texas instrument TI-84 Plus calculator, the problem I would like answered is, find the value of the indicated trigometric function. Find tangent theta, given secant theta = 1.3698 find tan theta, given sec theta = 1.3698 Click here to see answer by scott8148(6628)

 Question 619202: Which of the following is an equation of a line perpendicular to y= x-1 A. 3=y-x B. 2y-3=x C. y=x-3 D. y+3=x E. y=-x+3 Click here to see answer by ewatrrr(10682)

 Question 619270: Please help me solve this problem.. By how many degrees do you have to shift sin x = y to the right to make it look like the graph of cos x = y? Click here to see answer by lwsshak3(6463)

 Question 619424: f(x)=sinx Right (pie sign), Down 2, Reflect over the x-axis what is the new function of this. Click here to see answer by jim_thompson5910(28476)

 Question 619512: Can you help me solve this question? This is the only question that I can't solve out of my homework. A force of 100 pounds pulls a car on a track and makes an angle of 32 degrees with the track. To the nearest tenth, what is the force, in pounds, in the direction of the track? Click here to see answer by jim_thompson5910(28476)

 Question 619435: write an equation of the sine function with the given amplitude, period, phase shift, and vertical shift. Amplitude:3 period: 4pi Phase shift: -1/2pi vertical shift 1 Click here to see answer by lwsshak3(6463)

 Question 619473: Find exact solutions over the indicated intervals (x real and theta in degrees) 2sin^2theta+ 5sin theta-3=0, 0 degrees in less than or equal to theta less than 360 degrees Click here to see answer by lwsshak3(6463)

 Question 619742: If a right triangle has a hypotenuse of 10 ft and it appears to be a 45-45-90 triangle then waht is the perimeter? Click here to see answer by richwmiller(9135)
 Question 619742: If a right triangle has a hypotenuse of 10 ft and it appears to be a 45-45-90 triangle then waht is the perimeter? Click here to see answer by ewatrrr(10682)

 Question 619829: Solve each equation for 0 ≤ Θ ≤ 360 2 = sec theta A. 60, 300 B. 60 C. 315 D. 45, 315 Click here to see answer by ewatrrr(10682)
 Question 619829: Solve each equation for 0 ≤ Θ ≤ 360 2 = sec theta A. 60, 300 B. 60 C. 315 D. 45, 315 Click here to see answer by lwsshak3(6463)

 Question 619831: Solve each equation for 0 less than or equal to theta less than 360. -1/2 = cos theta Click here to see answer by ewatrrr(10682)

 Question 619818: the wheel on a truck are turning at 430 revolution per minutes as the truck travels 40 miles per hour. What is the radius of the wheel? Click here to see answer by lwsshak3(6463)

 Question 619876: As θ increases from pi/2 to pi radians, which of the following is true? cosθ increases from 0 to 1. tanθ decreases. sinθ decreases from 1 to 0. sinθ increases from 0 to 1. None of these is correct. the answer is the third one, but I dont understand why. I thought the first two were also correct? Click here to see answer by jim_thompson5910(28476)

 Question 619835: Suppose sinA = 12/13 with 90º≤A≤180º. Suppose also that sinB = -7/25 with -90º≤B≤0º. Find cos(A - B). Click here to see answer by lwsshak3(6463)

 Question 619900: Need help graphing and and describe the domain and range f(x)=sin(x)-5 Click here to see answer by lwsshak3(6463)

 Question 620194: csc (angle A) + tan (angle C) = 5x find x? Click here to see answer by math-vortex(472)

 Question 620386: Hi i am really struggling to know how to answer one of my questions, in my SAC booklet for methods. can you please help me solve this. Q. a man in a boat, point B is 3 kilometres from the nearest point O of a straight beach. his destination, point D is 6 km's along the beach from O. he can row at 4km/h & walk at 5km/h O ● ____________●C__________●D | | | | | | | | | | B● (there is a line from point B, to C which extends to point D. i just couldn't draw the triangle He decided to row to a point C, which is (x)km, along the beach from point O. and then walk from point C to his destination D. Find a general equation for the time, T, of this journey in terms of x. Click here to see answer by ankor@dixie-net.com(15624)

 Question 620533: how would find a positive co-terminal angle of 15pi/4 Click here to see answer by stanbon(57224)

 Question 620530: how would find a negative co-terminal angle of 15pi/4 Click here to see answer by Alan3354(30967)

 Question 621028: Give the component form of the resultant vector in the following. NOTE: Answer must be typed in using the following format --including the parentheses: (#,#) u=(3, -4) v=(-5, -2) u-v = Click here to see answer by jim_thompson5910(28476)

 Question 621031: Give the component form of the resultant vector in the following. NOTE: Answer must be typed in using the following format -- including the parentheses:(#,#). u =(10, 5) -3u = Click here to see answer by jim_thompson5910(28476)

 Question 621041: a rectangular room has an area of 60 ft^2.the width is 4 feet less than its length.find the width of the room.you don't have to draw a diagram. thanks. Click here to see answer by matt501823(7)

 Question 621025: . Give the component form of the resultant vector in the following. NOTE: Answer must be typed in using the following format -- including the parentheses: (#,#) u=(16,-8) v=(-5,3) u+v=? Click here to see answer by matt501823(7)

 Question 621093: Give the component form of the resultant vector in the following. NOTE: Answer must be typed in using the following format -- including the parentheses: (#,#) u=(9,2) v=(-5,-2) 2u-3v=? Click here to see answer by math-vortex(472)

 Question 621158: Solve for θ in the equation tan θ = 2.42 when 180º < θ < 360º. Round your answer to the nearest tenth of a degree. Click here to see answer by Edwin McCravy(8880)

 Question 621372: Write the equation of a sine curve that has an amplitude of 3, a period of and a phase shift of . Click here to see answer by KMST(1866)