# Questions on Algebra: Trigonometry answered by real tutors!

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

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

 Question 617200: i need help in my trigometry homework how can you solve this,, sketch one cycle of the graph of the sine function y=4sin(1/2)theta. please help me Click here to see answer by Alan3354(34677)

 Question 617165: Can you also help me with the expression cos^2 theta -cos 2 theta is equivalent to Click here to see answer by jsmallt9(3438)

 Question 617159: find all values of theta in the interval 0 less then or equal to theta less then or equal to 360 satisfy the equation sin2theta= sintheta Click here to see answer by jsmallt9(3438)

 Question 617271: A cruise ship sailed north for 50 km. Then, the captain turned the ship eastward through an angle of pi/6 and sailed an additional 50 km. Without using a calculator, determine an exact expression for the direct distance from the start to the finish of the cruise. Click here to see answer by nerdybill(7090)

 Question 617270: The wings on an airplane are usually angled upward relative to the body, fuselage, of the aircraft. This is known as dihedral, and makes the aircraft more stable in flight, especially during turbulence. Some aircraft hve double dihedral. Suppose that wing is designed as shown, with an initial dihedral angle of x for the first 6ft and an additional angle of x for the next 6 feet. Show that h2= 6sinx(1+2cosx). ... I have no idea where to start with this question. Click here to see answer by KMST(2478)

 Question 617346: Triangle ABC is an isosceles triangle. Its base is 16.2 cm and one base angle is 63o 20’. Find the length of one of the congruent sides to the nearest hundredth of a cm. Click here to see answer by scott8148(6628)

 Question 617372: If the longer leg of a 30, -60, -90 degree triangle is 6, what is the length of the hypotenuse? Click here to see answer by scott8148(6628)

 Question 617453: Which of the following is not a solution to the equation 4sin^2x=1? 1. 30 degrees 2. 210 degrees 3. 150 degrees 4. 120 degrees Click here to see answer by jsmallt9(3438)

 Question 617467: After a reflection in the x-axis, the parabola y=x^2-10 would have the equation? Click here to see answer by jsmallt9(3438)

 Question 617513: solve 3cos²x + 4cosx - 4 = 0 and write the general solution. Use your graphing calculator. Click here to see answer by lynnlo(4174)

 Question 617546: The length of a diagonal of a rectangle is 10cm. The diagonal is inclined at an angle θ° to a side of the rectangle. Show that the perimeter,P cm, of the rectangle is given by P=20√2 sin (θ+45)° Click here to see answer by Greenfinch(383)

 Question 617397: Find all angles θ between 0° and 180° satisfying the given equation.? Write your answers as a comma-separated list. sin theta =1/2 cos theta = sqrt3/2 Click here to see answer by lwsshak3(7678)

 Question 617824: If sin θ = 0.42 then what does sin (180+θ) equal? I recently did a trigonometry test and this was one of the questions on the non-calculator section. I know how to work it out using a calculator but I'm not sure how to do it without one. Click here to see answer by lwsshak3(7678)

 Question 617928: Cosx-sin(-x)=0 the directions are to use identities , then solve for x. Click here to see answer by Theo(3556)

 Question 618255: the question is find the exact value of sin theta if cos theta=5/7 and theta terminates in quadrant 4. Draw the angle theta in standard position and the exact valu of sin theta? Click here to see answer by jsmallt9(3438)

 Question 618317: find the exact value of cotangent theta if theta is in standard position and (-7,2) is on the terminal side of theta Click here to see answer by jsmallt9(3438)

 Question 618337: prove that following is an identity sin (2x) = 2cot x sin2x Click here to see answer by jsmallt9(3438)

 Question 618404: rewirte sin x^4 so that it involves only the first power of cosine..? stuck lol Click here to see answer by solver91311(18785)

 Question 618238: what is the amplitude, period, verticle shift and phase shift of the graph y= 4cos (2x-3.14/2)? what are the incraments of the graph itself? Click here to see answer by lwsshak3(7678)

 Question 618490: Which of the following. Is equivalent to 1-cos^2/cos^2? the answer is tan^2 but I don't know how that answer is reached. thanks Click here to see answer by Alan3354(34677)

 Question 618707: how to solve trigonometric identities? what are common step in all soutions Click here to see answer by Alan3354(34677)

 Question 618783: Rewrite sqrt3 sinx- cosx in terms of asine (x+theta). Click here to see answer by solver91311(18785)