2006年1月27日 · 4sinx = 0 , -sin^2x = 0 x = 0 , x = 0, pi, 2pi Why is it when I graph the equation sin3x - sinx = 0 on my calculator, it comes with 7 solutions when i only have 3?

2024年9月4日 · . differentiate (4sinx)(cosy)=1 w.r.t x and fine dy/dx Im stuck here (4cos x)(cos y)+ (4sin x)(-sin dy/dx[y]) Insights Blog -- Browse All Articles -- Physics Articles Physics Tutorials Physics Guides Physics FAQ Math Articles Math Tutorials Math Guides Math FAQ Education Articles Education Guides Bio/Chem Articles Technology Guides Computer ...

2003年11月9日 · A good way to check your answer is to reverse the process using the angle addition identity: sin (θ + φ) = sin θ cos φ + cos θ sin φ

2017年8月12日 · The number of solutions of the equation sin2x –2cosx + 4sinx = 4 in the interval [0, 5π] is what? Homework Equations sin2x=2sinxcosx The Attempt at a Solution sin2x-2cosx+4sinx=4 ⇒2sinxcosx-2cosx+4sinx=4 ⇒sinxcosx-cosx+2sinx=2 ⇒cosx (sinx-1)=2-2sinx ⇒cosx (sinx-1)=2 (1-sinx) ⇒cosx (sinx-1)= -2 (sinx-1) ⇒cosx = -2 ∴ There is no ...

2004年5月6日 · sin2x + 4sinx = cosx + 2 2. If sin(a)=8/17 , 0<a<pi/2 and tan(b)=7/24 , pi<b<3pi/2, find cos(a-b) 3. A balloon rises at the rate of 3m/s from a point 50m from an observer. Find the rate of change of the angle of elevation of the balloon from the observer when the balloon is 30m above the ground? Thanks very much!

2006年3月7日 · express sin4x in terms of sinx? Alright so I am working on my homework tonight (i'm in trig/calc), and I get everything done but the last problem. Anyways, I've been working on this for a while now and I can't even get an idea of where to start. Anyways, he says we need to express sin4x in...

2009年1月11日 · I am trying to solve this integral. Any help would be great. I 5/(3+4sinx) I tried suddinb t=tan x/2 but it gives me a result of: =5 I (1+x^2)/(3+11x) I am not sure what to do with this or if this is the right emthod any help would be great. Thanks Using I for integration sign.

2012年2月15日 · I am sorry, I mislead you a bit. There is only a single θ between 0 an 2pi. When you have equations of form a cosx + b sinx =c the easiest way to solve them is to write the left hand side in the form Rsin(x+θ).

2012年5月30日 · Homework Statement sin4x=(4sinxcosx)(1-2sin^2x) Homework Equations Trig identities. The Attempt at a Solution sin4x=(4sinxcosx)(1-2sin^2x)...

2016年7月31日 · A=3sinx+4cosx and B=3cosx-4sinx if B = 4 find A. What i tried is to use 4=3cosx-4sinx and solve for cosx now cosx = (4+4sinx)/3 plug this into A I end up getting A = (25sinx+16)/3 am I correct?