Anonymous_4657
Badges: 14
Rep:
?
#1
Report Thread starter 5 days ago
#1
I'm stuck on 11 part b and c. Do you use the discriminate. I tried and got the wrong answer completely.
Attached files
Last edited by Anonymous_4657; 5 days ago
0
reply
ThomH97
Badges: 21
Rep:
?
#2
Report 5 days ago
#2
What inequality do you get when you use the discriminant?
0
reply
Anonymous_4657
Badges: 14
Rep:
?
#3
Report Thread starter 5 days ago
#3
b^2 - 4ac > 0

(Original post by ThomH97)
What inequality do you get when you use the discriminant?
0
reply
Anonymous_4657
Badges: 14
Rep:
?
#4
Report Thread starter 5 days ago
#4
(Original post by Anonymous_4657)
b^2 - 4ac > 0
I tried putting values in but the answer was something completely different.
0
reply
mqb2766
Badges: 17
Rep:
?
#5
Report 5 days ago
#5
(Original post by Anonymous_4657)
I tried putting values in but the answer was something completely different.
What do you get when you sub the values?
0
reply
ThomH97
Badges: 21
Rep:
?
#6
Report 5 days ago
#6
(Original post by Anonymous_4657)
I tried putting values in but the answer was something completely different.
Are you using b is -20cos(theta), a is 1 and ç is 75?
0
reply
Anonymous_4657
Badges: 14
Rep:
?
#7
Report Thread starter 5 days ago
#7
cos theta > -1/6000
0
reply
mqb2766
Badges: 17
Rep:
?
#8
Report 5 days ago
#8
(Original post by Anonymous_4657)
cos theta > -1/6000
How?
0
reply
Anonymous_4657
Badges: 14
Rep:
?
#9
Report Thread starter 5 days ago
#9
(1)^2 - 4(-20cos theta) (75) > 0
1 + 6000cos theta > 0
cos theta . -1 /6000
0
reply
mqb2766
Badges: 17
Rep:
?
#10
Report 5 days ago
#10
(Original post by Anonymous_4657)
(1)^2 - 4(-20cos theta) (75) > 0
1 + 6000cos theta > 0
cos theta . -1 /6000
b is -20cos(theta)
a is 1
c is 75
Try again?
0
reply
Anonymous_4657
Badges: 14
Rep:
?
#11
Report Thread starter 5 days ago
#11
I've got it now!
Last edited by Anonymous_4657; 5 days ago
0
reply
mqb2766
Badges: 17
Rep:
?
#12
Report 5 days ago
#12
(Original post by Anonymous_4657)
I don't know what I did wrong actually.
it is not
a^2 - 4bc > 0
it is
b^2 - 4ac > 0
0
reply
Anonymous_4657
Badges: 14
Rep:
?
#13
Report Thread starter 5 days ago
#13
(Original post by mqb2766)
b is -20cos(theta)
a is 1
c is 75
Try again?
Can you help me with another maths question I've posted please?
0
reply
X

Quick Reply

Attached files
Write a reply...
Reply
new posts
Back
to top
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise

University open days

  • Bournemouth University
    Undergraduate Open Day Undergraduate
    Wed, 19 Feb '20
  • Buckinghamshire New University
    Postgraduate and professional courses Postgraduate
    Wed, 19 Feb '20
  • University of Warwick
    Warwick Business School Postgraduate
    Thu, 20 Feb '20

People at uni: do initiations (like heavy drinking) put you off joining sports societies?

Yes (199)
67.46%
No (96)
32.54%

Watched Threads

View All
Latest
My Feed