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Small Nov 08 Maths p3 problems.

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Zazzyo

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How do we consider the 2(thetha) in ques 6 prt (ii) .. wud apprciate sum detailed info as in the markscheme the solution is really vague..

and plz tell me how to verify this part (ii) in ques 8 ... its worth 1 marks only

nd how wud we use this is our differential integration?

Code: 
http://www.xtremepapers.net/CIE/International%20A%20And%20AS%20Level/9709%20-%20Mathematics/9709_w08_qp_3.pdf
 
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Anomaly

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Zazzyo said:
How do we consider the 2(thetha) in ques 6 prt (ii) .. wud apprciate sum detailed info as in the markscheme the solution is really vague..

and plz tell me how to verify this part (ii) in ques 8 ... its worth 1 marks only

nd how wud we use this is our differential integration?

Code: 
http://www.xtremepapers.net/CIE/International%20A%20And%20AS%20Level/9709%20-%20Mathematics/9709_w08_qp_3.pdf
Click to expand...


After getting 13sin(x+67.38) you just modify this to 13sin(2x+67.38) and double the range from 0-180 to 0-360 (final range is 67.38<0<427.38) after adding 67.38 to the upper and lower limits of the range.
To verify part II in 8 just use the RHS side taking the LCM and simplifying the equation, you'll end up with the LHS.
You have to use this info after rearranging the original proved differential equation (dh/dt= 5/h^2-1/20) and then use partial fractions
 
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