IGCSE/GCSE/O & A Level/IB/University Student Forum

Qualification => Subject Doubts => GCE AS & A2 Level => Math => Topic started by: mousa on January 29, 2010, 12:39:15 pm

Title: Pure one Doubt!!
Post by: mousa on January 29, 2010, 12:39:15 pm

plz can anyone Explain why a = 6 b = 2 c = 3 in Q 4 part a) ?? and answer Part b) find the paper attatched below...

Title: Re: Pure one Doubt!!
Post by: astarmathsandphysics on January 29, 2010, 12:52:14 pm

Gimme a minute

Title: Re: Pure one Doubt!!
Post by: astarmathsandphysics on January 29, 2010, 12:56:56 pm

Graph is moved up 3 so c=3
distance from crest to trough is 9--3=12 but for the sine curve it should be 1--1=2 so 6 times bigger so a=6.
The graph packs 2 wavelengths into 0-2pi so b=2

Title: Re: Pure one Doubt!!
Post by: Saladin on January 29, 2010, 12:59:30 pm

and the answer to part b is 165^o or also 11/12pi

Title: Re: Pure one Doubt!!
Post by: mousa on January 29, 2010, 02:33:55 pm

Quote from: astarmathsandphysics on January 29, 2010, 12:56:56 pm

Graph is moved up 3 so c=3
distance from crest to trough is 9--3=12 but for the sine curve it should be 1--1=2 so 6 times bigger so a=6.
The graph packs 2 wavelengths into 0-2pi so b=2

sir, i am confused, can you explain more?? or gimme some notes on this topic,nothin regarding that is mentioned in the book :-\

Title: Re: Pure one Doubt!!
Post by: astarmathsandphysics on January 29, 2010, 02:47:40 pm

wait one mo.

Title: Re: Pure one Doubt!!
Post by: astarmathsandphysics on January 29, 2010, 02:48:41 pm

http://www.astarmathsandphysics.com/a_level_maths_notes/C3/a_level_maths_notes_c3_transformations_of_graphs.html