What is the cos0? - Socratic
2015年4月15日 · Simple cos 0 = 1. How do you use the ordered pairs on a unit circle to evaluate a trigonometric function of any angle?
SOLUTION: When does cos(x) = 0? - Algebra Homework Help
From the "unit circle" cos(x)=0 when In terms of degrees: 90 and 270 degrees In terms of radians: (pi)/2 ...
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View question - Cos^2 (0)
2014年11月6日 · Best Answer. cos(0) = 1. So [cos(0)]^2 = [cos(0)] * [cos(0)] = 1 * 1 = 1 ....!!! CPhill Nov 6, 2014. Post New Answer
SOLUTION: find value of: cos(2π/7)+cos(4π/7)+cos(6π/7)
cos(0) = 1 cos(2pi/7) = a cos(4pi/7) = b cos(6pi/7) = c cos(8pi/7) = cos(6pi/7) = c cos(10pi/7) = cos(4pi/7) = b cos(12pi/7) = cos(2pi/7) = a Once again note the symmetry. Those 7 values add …
How do you find the general solutions for cos 2x + cos x - 2 =0?
2015年8月12日 · How do you find the general solutions for #cos 2x + cos x - 2 =0#? Trigonometry Trigonometric Identities and Equations Solving Trigonometric Equations 1 Answer
SOLUTION: Given cos 0=-4/5, and the angle 0 is in quadrant two, …
Question 763289: Given cos 0=-4/5, and the angle 0 is in quadrant two, find the value for sin 0. Answer by lwsshak3(11628) ( Show Source ): You can put this solution on YOUR website!
SOLUTION: Prove that cos(20°) + cos(100°) + cos(140°) = 0
You can put this solution on YOUR website! To prove: cos(20°) + cos(100°) +cos(140°) = 0 Write the angles in the first two terms in terms of their average, which is 60°, a special angle, and …
SOLUTION: if sin (a)=0.35 and cos (a)<0 then, cos (a)= sin (2a)
You can put this solution on YOUR website! if sin(a)=0.35 and cos(a)0 then, sin(A) = 7/20 = y/r cos(A) 0 --> Q2 ...
SOLUTION: The solutions of cos 2x = 0, in the interval 0 < x < 360
The solutions of cos 2x = 0, in the interval 0 x 360. If we Let y=2x then we can rewrite cos 2x = 0 as cos y = 0. From the "unit circle" we know that this will be true when y = 90 deg and 270 …