Math Homework

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Solve equations / uneven contacts. a) 20cos2x 3cosx + - 2
Solve equations / uneven contacts. a) 20cos2x 3cosx + - 2 = 0 b) 3tan2x - 8tanx - 3 = 0 c) (cosx - 1/3) (cosx + 1/3) / (cosx - 1/2) (cosx + 1/2) ≥ 0 d) (tanx - 2) / (2tanx + 3) <0… read more
Mijcar
Consultant
Master's Degree
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solve the equations: a) 20cos2x + 3cosx – 2 = 0 b) 3tan2x
solve the equations: a) 20cos2x + 3cosx – 2 = 0 b) 3tan2x – 8tanx – 3 = 0 c) (cosx - 1/3)(cosx + 1/3)/(cosx - 1/2)(cosx + 1/2) ≥0 d) (tanx – 2)/(2tanx + 3) < 0… read more
Trigeoscal
College Math Professor
Master's Degree
960 satisfied customers
Sandyhya, thanks again but I have a couple more questions: 1)
Sandyhya, thanks again but I have a couple more questions: 1) Verify the identity: Cos (x - PI/4) = Sqrt2/2 (Cos x + sin X) -Not sure if I'm doing this correct, but I come up with no Identity 2) Use a… read more
Sandhya
Master's Degree
5,178 satisfied customers
For David: As you assisted with a previous problem, I would
For David: As you assisted with a previous problem, I would like to follow up with another question that I have more detail for: Solve for x; 0 ≤ x < 360 sin2x = cosx 2sinxcosx - cosx = 0 cosx (2si… read more
David
Post-Doctoral Degree
Post-Doctoral Degree
2,310 satisfied customers
Determine the general solution for 2(cos^2)x - 5cosx12 0
Determine the general solution for: 2(cos^2)x - 5cosx12 = 0? (MULTIPLE CHOICE)? Determine the general solution for: 2(cos^2)x - 5cosx12 = 0? (MULTIPLE CHOICE)? a) 1.05 + npi, 4.19 + npi b) 1.05 + 2npi… read more
akch2002
Master's Degree
3,041 satisfied customers
Factor then simplify (2tan^2-5 tan x - 3)/(4sin x - 16)
Factor then simplify: (2tan^2-5 tan x - 3)/(4sin x - 16) multiply by (sin^2 x - 16)/(2tan x +1)… read more
Sandhya
Master's Degree
5,178 satisfied customers
How do I (1) prove cos (x + Pi/2) -sinx (2) simplify (tanx+1)square
How do I (Question1) prove cos (x + Pi/2)=-sinx and (Question2) simplify (tanx+1)square times cosx… read more
Dr. Dan
Doctoral Degree
912 satisfied customers
Dr. Dan, br hi, we are given the problem br br y + 4y
Dr. Dan, hi, we are given the problem y'' + 4y = 4 cos(2x) and they want us to find what the general solution is. heres my work: they gave us a hint saying we can replace cos2x with e^(2ix), i being t… read more
Dr. Dan
Doctoral Degree
912 satisfied customers
find dy/dx if 1/3*x^3 + 2x +4xsin(X) +4 cos(X) + sin(2x)
find dy/dx if 1/3*x^3 + 2x +4xsin(X) +4 cos(X) + sin(2x) and prove that dy/dx = {x+2cos(X)}^2… read more
ck_mba
Computer Engineer
Master's Degree
1,397 satisfied customers
1). Prove the identity cos 3 - cos 7 / sin 7 + sin 3
1). Prove the identity cos 3? - cos 7? / sin 7? + sin 3? = tan 2? 2). Prove the identity cos 3? = 4 cos^3 ? - 3 cos ? 3). Solve the following giving answer in radian in the range 0 to 2p (pi): a). cos… read more
Jim C
Master's Degree
523 satisfied customers
hi how do i solve this trig equation relative to the unit circle
hi how do i solve this trig equation relative to the unit circle 2cos^(2)x+cosx-1=1 and this one secx=tanx=1 and 2sin^(2)2x=1… read more
Jim C
Master's Degree
523 satisfied customers
solve the equation cosx + cos2x 0 for 0 is less than
solve the equation cosx + cos2x = 0 for 0 is less than or equal to x which is less than or equal to 360 degrees… read more
Ben Brown
Bachelor's Degree
512 satisfied customers
Calculus - tan x and sec x substitutions Could someone please
Calculus - tan x and sec x substitutions? Could someone please start me off/show me how this is done. Just the answer will not help me as I am trying to learn it as part of an exam revision schedule. … read more
Scott
Master's Degree
16,058 satisfied customers
I am trying to solve (sinx)^2 2tanx and (cosx)^2 sinx.
I am trying to solve (sinx)^2 = 2tanx and (cosx)^2 = sinx. For the 2nd equation I thought I could substitute 1-(sinx)^2 for (cosx)^2 and solve by quadratic formula. Is that correct? I don't know about… read more
Elizabeth
Master's Degree
534 satisfied customers
1. A lookout on a boat sailing directly away from a 120 building
1. A lookout on a boat sailing directly away from a 120' building takes two sightings of the top of the building. The first has an angle of elevation of 34 degree and the second an angle of elevation … read more
Ramanujam
Master's Degree
16 satisfied customers
Help me Scottsinct- youre my only hope! Ive solved these
Help me Scottsinct- you're my only hope! I've solved these problems but am not getting the correct answers. Can you point out where I'm going wrong? For the method, I need to use Trig Identities, Doub… read more
Scott
Master's Degree
16,058 satisfied customers
1.Find the area of the following triangles (use logarithms) a.
5.Verify the following identities: a. sin 2x= 2(tan x)/(1 + tan^2 x) b. (sin 2 theta)/(sin theta) - (cos 2 theta )/(cos theta) = sec theta c. sin ( x+y) cos (x-y) + cos (x+y) sin (x-y) = sin 2x d. cos… read more
Greg
Master's Degree
1,292 satisfied customers
show work 1) verify sin(x+y)cos(x-y)+Cos(x+y)sin(x-y) sin2x
show work 1) verify sin(x+y)cos(x-y)+Cos(x+y)sin(x-y) =sin2x B) cos2x=(cot^2x-1)/(cot^2x+1) 2)Simplify to involve a function of only one angle a)(sin80-sin10)/ (sin80+10) B)(sin130+sin20)/(cos130+cos2… read more
Greg
Master's Degree
1,292 satisfied customers
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