Qualification > Math

C1 Edexcel Jan2010 Question! Please help!

<< < (7/9) > >>

astarmathsandphysics:
120
120*0.95
120*0.95^2
etc

halosh92:

--- Quote from: nid404 on April 28, 2010, 08:55:06 am ---Do you need the a) part as well? (i mean the curve)

b) sin-10.35= x-30
    x=20.5o+30
     =50.5o






--- End quote ---
no i dont need part (a) thx
but thats not the answer..i got 50.5 but then wat do we do ?
:S ???

nid404:
what's the answer?

halosh92:

--- Quote from: nid404 on April 28, 2010, 09:41:19 am ---what's the answer?

--- End quote ---

-170.5
50.5

nid404:
oh yes
it says all possible values...
sin(180-theta)=sin theta => value of x in this case is great than 180...so rejected
sin(-180-theta)=sin theta

-180-20.5=-200.5
-200.5= x-30
x=170.5

Navigation

[0] Message Index

[#] Next page

[*] Previous page