What is the value of cos θ given that (-2, 9) is a point on the terminal side of θ?

a)  cosθ  =

Step-by-step explanation:

Step(i):-

Given point ( x , y ) = ( - 2 , 3 )

We know that the polar co-ordinates

  x = r cos θ and y = r sinθ

where    

Step(ii):-

           x = r cos θ

          cosθ  

      cosθ  =

       cosθ  =

did you get the answer yet?

step-by-step explanation:

multiplication is multiplication.   it might feel harder depending on what level of math you are in, but generally it will be the same old stuff, while implementing some new concepts and methods of solving work.