Why is cos(0) = 1? - Socratic
2015年6月28日 · The x-coordinate is the cos value and the y-coordinate is the sin value. Answer link. In terms of the right triangles used to define trigonometric functions, cos (x) = frac …
When cosx=0, what does x equal? - Socratic
2016年5月15日 · 90^o x= cos^-1(0) = 90^o Using the cosine graph, x could also = 270^o, 450^o, 810^o, -90^o, -270^o, -450^o, -810^o etc.
SOLUTION: When does cos(x) = 0? - Algebra Homework Help
When does cos(x) = 0? From the "unit circle" cos(x)=0 when In terms of degrees: 90 and 270 degrees
How do you solve cos x + sin x = 0? | Socratic
2015年6月7日 · cosx + sinx = 0. cosx = − sinx. 1 = − tanx. −1 = tanx. tanx is equal to −1 at 3π 4 and 7π 4.
Fundamental Identities - Trigonometry - Socratic
Divide the fundamental identity # sin^2x + cos^2x = 1# by #sin^2x# or #cos^2x# to derive the other two: #sin^2x/sin^2x + cos^2x/sin^2x = 1/sin^2x#. #1 + cot^2x = csc^2x#. #sin^2x/cos^2x …
How do you solve cosx=0? - Socratic
2016年4月1日 · Answer link. 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 …
When cosx=1, what does x equal? - Socratic
2016年9月30日 · 1 Answer. x can be any integer multiple of 2π, including 0. The function cos(x) has period 2π and cos(0) = 1. Hence: cos(2nπ) = 1 for any integer n. graph {cos (x) [-10, 10, …
What does cosx sinx equal? - Socratic
2016年3月7日 · Answer link. cos (x)sin (x) = sin (2x)/2 So we have cos (x)sin (x) If we multiply it by two we have 2cos (x)sin (x) Which we can say it's a sum cos (x)sin (x)+sin (x)cos (x) Which …
Double Angle Identities - Trigonometry - Socratic
Answer: As below. Explanation: Following table gives the double angle identities which can be used while solving the equations. You can also have sin2θ,cos2θ expressed in terms of tanθ …
What is the limit as x approaches infinity of cosx? | Socratic
2015年7月14日 · For any x_N in this sequence cos(x_N)=0. So, the first sequence of values of cos(x_N) equals to 1 and the limit must be 1. But the second sequence of values of cos(x_N) …