|Sep24-12, 09:35 AM||#1|
Trig functions, finding co-ordinates
1. The problem statement, all variables and given/known data
I have a graph with the functions f(x)=sin2x and g(x)=cosx. The 2 graphs intersect at point B. They want me to find the co-ordinates of B.
2. Relevant equations
3. The attempt at a solution
Must I equate the two graphs?
sin2x = cosx
2x = 90-x, 3x = 90, x=30 or 2x = 180-(90-x), x=90
It doesnt seem right, is their any other steps?
|Sep24-12, 10:11 AM||#2|
Aren't you given any specific range within which you want the solution, both the graphs intersect at many points.
|Sep24-12, 10:29 AM||#3|
they say that f and g intersect at A(30:0.87) and B.
the domain is xE[0;270].
Thats all that is given.
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