O-Level Additional Math

[MathIzzzFun]

My teacher is giving us revision paper. I cannot do this question. Can somebody b pls help?


Thank you

Use right-angle triangle OCQ. Angle COQ= 30°

I believe you can sort this out.

cheers.

[KSP2013777]

I know OB is 15 cm, but what is OQ?

[MathIzzzFun]

I know OB is 15 cm, but what is OQ?

OC = (15-r) cm
Sin (angle COQ) = sin 30° = 1/2

Can continue ?

cheers.

[linden2000]

Hi. Would really appreciate help with this question below. Many thanks.

Given that y=m^3/n^2, express y' in terms of m, m', n and n'.

[EconsPhDTutor]

I know OB is 15 cm, but what is OQ?

The answers are (b) 20 × √3, (c) 37.5 π.

Please see this PDF for the full solution.

www.EconsPhDTutor.com

[EconsPhDTutor]

Hi. Would really appreciate help with this question below. Many thanks.

Given that y=m^3/n^2, express y' in terms of m, m', n and n'.

Hello

T̶h̶e̶ ̶a̶n̶s̶w̶e̶r̶ ̶i̶s̶ ̶ ̶y̶'̶ ̶=̶ ̶(̶m̶²̶/̶n̶²̶)̶ ̶×̶ ̶(̶3̶m̶'̶ ̶-̶ ̶2̶m̶ ̶×̶ ̶n̶'̶)̶

The answer is y' = (m²/n²) × [3m' - (2m × n' ÷ n)].

Please see this PDF for the full solution.

www.EconsPhDTutor.com

[linden2000]

Hi. Would really appreciate help with this question below. Many thanks.

Given that y=m^3/n^2, express y' in terms of m, m', n and n'.

Hello

The answer is y' = (m²/n²) × (3m' - 2m × n')

Please see this PDF for the full solution.

www.EconsPhDTutor.com

Thank you!
Understand it now. Should line 1 be 2n instead of 2n^2?

[KSP2013777]

Yes, can continue now. Didn't think to use OC. Thanks very much.

[KSP2013777]

Yes, can continue now. Didn't think to use OC. Thanks very much.

[EconsPhDTutor]

Thank you!
Understand it now. Should line 1 be 2n instead of 2n^2?

Hello linden2000,

Yes you are right. I am sorry, that was my mistake. I have corrected it. Please see the same PDF link again where my mistake is now corrected.