O-Level Additional Math

[KiausuLormee]

Thank you JieHeng for your help.


:thankyou:

[Michaelia0816]

Pls help me it is very urgent!Thank you very much!

Question:

It is given that A=h(4m+1/3r).

Find the exact value of A when h is 20m, m is 1/5 and r is -7.

[jieheng]

Michaelia0816:

Pls help me it is very urgent!Thank you very much!

Question:

It is given that A=h(4m+1/3r).

Find the exact value of A when h is 20m, m is 1/5 and r is -7.

I assume 1/3r as (1/3)r and not 1/(3r)

A
=h[4m+(1/3)r]
=20m[4m+(1/3)r]
=20(1/5)[4(1/5) + (1/3)(-7)]
=4(4/5 - 7/3)
=4( 12/15 - 35/15 )
=4 (- 23/15)
= - 92/15
= - 6 2/15

[S-H]

Hi, can someone help me with these 2 questions?


http://i46.tinypic.com/en0nr.png\"> http://i48.tinypic.com/28gw2ab.png\">

Thank you!

[S-H]

Hi, can someone help me with these 2 questions?


http://i46.tinypic.com/en0nr.png\"> http://i48.tinypic.com/28gw2ab.png\">

Thank you!

[jieheng]

S-H:

Hi, can someone help me with these 2 questions?


http://i46.tinypic.com/en0nr.png\">
Thank you!

http://i49.tinypic.com/w0t6qv.jpg\">

[jieheng]

S-H:

Hi, can someone help me with these 2 questions?


http://i48.tinypic.com/28gw2ab.png\">

Thank you!

http://i46.tinypic.com/1hatki.jpg\"> http://i48.tinypic.com/2ymitu8.jpg\">

[S-H]

Thank you very much jieheng!

[kuts]

Hi, need help please…

Find the unknown number when given conditions of HCF and LCM of two numbers?

Thanks in advance

[S-H]

Hi can someone help me with these 2 questions, thank you very much!


1) Given that cos A = p, where p>0 and 90°<A<360°, find in terms of p,
(i) tan(-A)
(ii) cos 1/2A,
(iii) cosec(90°-A)

2) The equation of a circle C1 is x^2+y^2-4x+2y-20=0.
(i) Find the radius and the coordinates of the centre of circle C1.
The line 3y+x=14 intersects the circle C1 at P and Q respectively,
(ii) Find the equation of the perpendicular bisector of PQ.
Another circle C2 with the same radius as C1 passes through P and Q,
(iii) Find the coodinates of the centre of C2,
(IV) Hence, state the equation of circle C2.