2015年6月28日 · At #0# degrees, the angle intercepts the Unit Circle at the coordinate #(1,0)#. The coordinates are the trig values. The coordinates are the trig values. The x-coordinate is …

2018年6月1日 · see below cos^(-1)0=arccos 0 What is the arc which cosine is zero?: two posibilities 90=pi/2 and 270=3pi/2 This is assuming that cos^(-1) is the inverse of cosine. …

From the "unit circle" cos(x)=0 when In terms of degrees: 90 and 270 degrees In terms of radians: (pi)/2 ...

2016年4月1日 · x=pi/2+kpi, k in ZZ In the trigonometric circle you will notice that cos(x)=0 corresponds to x=pi/2 and also x=-pi/2. Additionally to these all the angles that make a …

2018年3月24日 · x=0, (2pi)/3, (4pi)/3 Recall that cos(2x)=cos^2x-sin^2x. Now, we have cos^2x-sin^2x-cosx=0 However, we want our equation in terms of only one trigonometric function. We …

2017年2月18日 · x = pi/2, (3pi)/2, pi/4, (3pi)/4, (5pi)/4 and (7pi)/4 Note that cos3x can be rewritten as cos(2x + x). cosx + cos(2x + x) = 0 Now use cos(A + B) = cosAcosB - sinAsinB. cosx + …

2018年4月5日 · sin 2x + cos x = 0 2sin x.cos x + cos x = 0 cos x(2sin x + 1) = 0 either factor should be zero. a. cos x = 0 Unit circle gives 2 solutions -->

2018年4月17日 · Quadrant 3 if cos(θ) is negative the terminal side of θ is in either quadrant 2 or 3. if tan(θ) is positive the terminal side of θ is in either quadrant 1 or 3. (sin and cos are both …

2015年6月16日 · tan(x)+sqrt3=0 has two solutions: x_1 = -pi/3 x_2 = pi-pi/3 = (2pi)/3 The equation tan(x)+sqrt3=0 can be rewritten as tan(x)=-sqrt3 Knowing that tan(x) = sin(x)/cos(x ...

2015年6月7日 · cosx + sinx = 0 cos x = -sinx 1 = -tanx -1 = tanx tanx is equal to -1 at (3pi)/4 and (7pi)/4