Jul 23, 2019 · Given that sin x = √2/2, and 90<x<180, this means that the angle, x, is 135 degrees. And it is in the 2nd quadrant. If take 135/2 we find that x/2 = 67.5 degrees so x/2 is in …

Mar 5, 2015 · Since the result is 2, it must mean that the opposite side divided by the djacent side equals 2. This only occurs whens the oppostie side is twice the adjacent side. Therefore it …

Nov 18, 2012 · Angel's answer is generally correct, if a bit confusing. I would have said it this way: think of (sin 2 x - sin 2 x cos 2 x) as (a - ab) where a=sin 2 x and b=cos 2 x. Now, when …

Oct 6, 2014 · If tan(x) = 2, the x = 63.435°. cos(2x) = cos(2·63.435°) = cos(126.870°) = -0.6 This can also be done without a calculator, if you need that explanation, please repost.

Apr 11, 2020 · I'm guessing because I don't know if Tan(x) = -4/3 or is = -4 3 so I'm using the first assumption = -4/3. This would make a 3:4:5 triangle in the 4th quadrant, so it would be x=4,y= …

Oct 29, 2020 · tan(x)[1 - 2sin(x)] = 0. Using the zero product rule, set each of the factors equal to zero to solve. a) tan(x) = 0 which has the solution x = 0 or x = π on the interval given. b) 1 - …

Jul 24, 2019 · sin 2 (x) = 400/841. sin(x) = ±20/29. Note that the above gives two possible values for sin(x), but since 0° < x < 90° (x is in the first quadrant), we choose the positive value. That …

Jun 9, 2016 · 1-tan^2(x) = 1 - (sin 2 x)/(cos 2 x) = [cos 2 x - sin 2 x]/cos 2 x = [cos 2x]/cos 2 x is a posibly 'simplified' version in that it has been boiled down to only cosines.

Jul 17, 2016 · Once you get the angle in degrees, realize that you have x/2 as the angle of the tangent, so whatever the degree is, it is equal to x/2. In other words, the angle you get is only …

Feb 6, 2015 · Free Online Scientific Notation Calculator. Solve advanced problems in Physics, Mathematics and Engineering. Math Expression Renderer, Plots, Unit Converter, Equation …