A community for students. Sign up today!
Here's the question you clicked on:
 0 viewing
 one year ago
Halp meh pliss,
The number of positive values of x less than 360 degrees which satisfy the equation sin 1/2x =cos x is?
a)0 b)1) c)2 d)3 e)4
 one year ago
Halp meh pliss, The number of positive values of x less than 360 degrees which satisfy the equation sin 1/2x =cos x is? a)0 b)1) c)2 d)3 e)4

This Question is Closed

saifoo.khan
 one year ago
Best ResponseYou've already chosen the best response.1You do math too? D:

hba
 one year ago
Best ResponseYou've already chosen the best response.1Mujhe bhi yaqeen nahi horaha :P

satellite73
 one year ago
Best ResponseYou've already chosen the best response.0looks like there are two http://www.wolframalpha.com/input/?i=sin%28x%2F2%29%2Ccos%28x%29+domain+0..2pi

yrelhan4
 one year ago
Best ResponseYou've already chosen the best response.3write cosx in terms of sin^2 x/2 and solve!

yrelhan4
 one year ago
Best ResponseYou've already chosen the best response.3you get a quadratic.. solve for x..

yrelhan4
 one year ago
Best ResponseYou've already chosen the best response.32t^2 + t 1=0 where t=sin(x/2)

uri
 one year ago
Best ResponseYou've already chosen the best response.0Quad,breaking the middle term or completing the square method?

yrelhan4
 one year ago
Best ResponseYou've already chosen the best response.3breaking the middle term.. you would get (2t1)(t+1)=0 where t=sin(x/2)

uri
 one year ago
Best ResponseYou've already chosen the best response.0eh,2t1=0=)t=1/2 t+1=0=)t=1

yrelhan4
 one year ago
Best ResponseYou've already chosen the best response.3so there would be 3 values of x/2 in 0 to 360.. 30,120,270. so x=60,240,540.. since you want from 0 to 360.. there would be 2 solns..

yrelhan4
 one year ago
Best ResponseYou've already chosen the best response.3if sin(x/2) = 1/2 , what is x? 0>x>360

yrelhan4
 one year ago
Best ResponseYou've already chosen the best response.31 sin^2(x/2)= cosx @hba

yrelhan4
 one year ago
Best ResponseYou've already chosen the best response.3look.. let x/2=k .. sin(k)=1/2 > k=30, 120.. > x=60, 240

yrelhan4
 one year ago
Best ResponseYou've already chosen the best response.3cosx= 12sin^2 (x/2) @hba missed the two..

sirm3d
 one year ago
Best ResponseYou've already chosen the best response.2@yrelhan4 since \(\displaystyle 0 \leq x \leq 360\) then \(\displaystyle 0 \leq \frac{x}{2} \leq 180\)

sirm3d
 one year ago
Best ResponseYou've already chosen the best response.2now, \(\sin x/2 = 1/2\) therefore \(x/2=30, 150\) or \(x=60, 300\)

uri
 one year ago
Best ResponseYou've already chosen the best response.0Yrelhan GUESSSS WHAT?! I donyt undastand aaaanythang nd ima sho confuzzeld tooh,I caant eveen speel corractly. o.O

yrelhan4
 one year ago
Best ResponseYou've already chosen the best response.3lol.. i am such a fool.. you are right! @sirm3d

uri
 one year ago
Best ResponseYou've already chosen the best response.0Wut iz the aaansweeer?! none of my option matches your answer!

yrelhan4
 one year ago
Best ResponseYou've already chosen the best response.3i just wrotw150 value wrong, right? why am i a fool then? :P

sirm3d
 one year ago
Best ResponseYou've already chosen the best response.2the other equation, \(\sin x/2 = 1\) has no solution in \(0 \leq \frac{x}{2} \leq 180\)

uri
 one year ago
Best ResponseYou've already chosen the best response.0@sirm3d sinx/2=1 has no solution so we will leave it? xD

yrelhan4
 one year ago
Best ResponseYou've already chosen the best response.3@uri its sin(x/2) = 1

sirm3d
 one year ago
Best ResponseYou've already chosen the best response.2@uri, just count the number of solutions: \(x=60^0,\;300^0\)

yrelhan4
 one year ago
Best ResponseYou've already chosen the best response.3are kitni baar puchegi? @uri :P

uri
 one year ago
Best ResponseYou've already chosen the best response.0AMG THANKYOUUUUUUUUUUUUU!AMG THANKYOUU SOO MUCHHHHH!!!! :D

yrelhan4
 one year ago
Best ResponseYou've already chosen the best response.3mera medal.. :'( .. aadha to maine solve kiya..

yrelhan4
 one year ago
Best ResponseYou've already chosen the best response.3haha.. he's got 2 now too!
Ask your own question
Ask a QuestionFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.