Qualification > Math

C1 and C2 DOUBTS HERE!!!!!

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T.Q:

--- Quote from: abuelzouz on May 07, 2010, 01:47:14 pm ---!! ??

--- End quote ---

check this http://www.astarmathsandphysics.com/a_level_maths_notes/C2/a_level_maths_notes_c2_trapezium_rule.html

halosh92:
The curve C has equation y = cos( x + pie/4) ,  0 < x < 2pie.

 

(a)   Sketch C.                                                                                                                   (2 marks)

 

(b)   Write down the exact coordinates of the points at which C meets the coordinate axes.

       (3 marks)

 

(c)   Solve, for x in the interval 0 <x < 2pie,

cos ( x + pie/4) = 0.5,
            giving your answers in terms of p.



plzzz plzz could anyone solve this...im having a brain breakdown god dammiiitttttt

Saladin:
Please send the exact question paper.

halosh92:
Q7

Saladin:
Ok, I answered question 1. Just in degrees. It is simple the graph moved 45 degrees back.

(b) You know the x-axis intercepts. They are and . They are simple the places where the original crosses the x-axis but those values.

(c)

There are two possible values of

Now you also are told to find all intercepts, so also y axis. Simple make x=0 and calculate the value of y through the equation to get

They are:

and . So you simply now equate this back into the equation.

And you will get and .

Hope that helps.

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