Another question.

[Valentas]

It is given f(x) = 2cos(2x - pi/3)

The question is:

I need to find out coordinates where crosses this graph with another straight:

a) x = 9pi/2 b) y = -1

Really need help.

 

[Deleted member 4993]

It is given f(x) = 2cos(2x - pi/3)

The question is:

I need to find out coordinates where crosses this graph with another straight:

a) x = 9pi/2

Need to evaluate f(9?/2)
b) y = -1

-1 = 2*cos(2*x - ?/3)

solve for 'x'

Really need help.

 

[Valentas]

Need to evaluate f(9?/2)

Still can't get the point why should I do that...

 

[Deleted member 4993]

"x = a" is a vertical line.

It will intersect f(x) at [a,f(a)]