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Help me please!
Solve the equation
3 cosec x + 8 cos x = 0
for x in the interval 0 < x < 180, giving your answers to 1 decimal place.
I have no idea why I find this question so hard!!! It's only question 1 on the paper - lame, huh? tbh, I'll find it easy once I've got going, but I don't know where to start. Any suggestions??? ...At all?
3 cosec x + 8 cos x = 0
for x in the interval 0 < x < 180, giving your answers to 1 decimal place.
I have no idea why I find this question so hard!!! It's only question 1 on the paper - lame, huh? tbh, I'll find it easy once I've got going, but I don't know where to start. Any suggestions??? ...At all?
Solve the equation
3 cosec x + 8 cos x = 0
for x in the interval 0 < x < 180, giving your answers to 1 decimal place.
I have no idea why I find this question so hard!!! It's only question 1 on the paper - lame, huh? tbh, I'll find it easy once I've got going, but I don't know where to start. Any suggestions??? ...At all?
3 cosec x + 8 cos x = 0
for x in the interval 0 < x < 180, giving your answers to 1 decimal place.
I have no idea why I find this question so hard!!! It's only question 1 on the paper - lame, huh? tbh, I'll find it easy once I've got going, but I don't know where to start. Any suggestions??? ...At all?
Jelkin
Solve the equation
3 cosec x + 8 cos x = 0
for x in the interval 0 < x < 180, giving your answers to 1 decimal place.
I have no idea why I find this question so hard!!! It's only question 1 on the paper - lame, huh? tbh, I'll find it easy once I've got going, but I don't know where to start. Any suggestions??? ...At all?
3 cosec x + 8 cos x = 0
for x in the interval 0 < x < 180, giving your answers to 1 decimal place.
I have no idea why I find this question so hard!!! It's only question 1 on the paper - lame, huh? tbh, I'll find it easy once I've got going, but I don't know where to start. Any suggestions??? ...At all?
3/sinx+8cox=0
3+8sinxcosx=0
8sinxcosx=-3
4sin2x=-3
sin2x=-3/4.
Solve to find values of 2x and hence values of x in the required interval [Remember the CAST diagram].
If you ever need maths help you'll probably get more replies in the maths forum in the academic help section.
I'm sorry to post this on this board but no one is on the maths board and I need help!
Solve the equation
3 cosec x + 8 cos x = 0
for x in the interval 0 < x < 180, giving your answers to 1 decimal place.
I have no idea why I find this question so hard!!! It's only question 1 on the paper - lame, huh? tbh, I'll find it easy once I've got going, but I don't know where to start. Any suggestions??? ...At all?
Solve the equation
3 cosec x + 8 cos x = 0
for x in the interval 0 < x < 180, giving your answers to 1 decimal place.
I have no idea why I find this question so hard!!! It's only question 1 on the paper - lame, huh? tbh, I'll find it easy once I've got going, but I don't know where to start. Any suggestions??? ...At all?
Jelkin
Thanks! I did try posting it in the Maths forum but no one has posted anything on there in ages so I didn't think I'd get a reply!
Np. I meant this one: http://www.thestudentroom.co.uk/f56.html
3cosec x + 8cos x = 0
3/sinx + 8cosx = 0
3 + 8sinxcosx = 0 . . . (multiplied through by sinx)
3 + 4(2sinxcosx) = 0
3 + 4sin2x = 0
sin2x = -3/4
2x = -48.6 , 228.6 , 311.4 degrees
x = 114.3 , 155.7 degrees {the other one is outside the range}
Oh, and I'm surprised no-one else in Maths has answered this :s
3/sinx + 8cosx = 0
3 + 8sinxcosx = 0 . . . (multiplied through by sinx)
3 + 4(2sinxcosx) = 0
3 + 4sin2x = 0
sin2x = -3/4
2x = -48.6 , 228.6 , 311.4 degrees
x = 114.3 , 155.7 degrees {the other one is outside the range}
Oh, and I'm surprised no-one else in Maths has answered this :s
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