EDEXCEL C12 WMA01 post you doubts here

[salah kilani]

hey guys could you tell me when you are taking your c12 exam and what are your doubts about it and im searching for anyone in kuwait for a question personal that i would like to ask so if you're from kuwait plz contact me thanks in advance

 

[MoatazKotb♥]

Tommorow (9:00 AM )


I just need some help with Surds and Trig.

First


_____________________________ (Question 1 )____________________________
Surds

3.(i)
Show that
(5-√8)(1+√2)=a+b√2
Giving the values of the integers a and b
(ii)
Show that
√80+30\5 =c√5
Where c is an integer


___________________________(Question 2 )_________________________


Trigonometry

8.(a)
Show that the equation
4sin2x + 9cosx - 6 = 0
Can be written as
4cos2x - 9cosx + 2 = 0

(b)
Hence Solve, for 0≤x<720°
4sin2x + 9cosx - 6 = 0
Giving your answers to 1 Decimal place


Thank you for reading

 

[iamback!]

Is that sin2x or sin square x ?

 

[MoatazKotb♥]

squared x mb