Idon't really understand would be great

Two cities a and b are 1400km apart and lie on the same n-s line. the latitude of city a is 23 degrees. what is the latitude of city b. the radius of the earth is approximately 6400km.

If cos(θ)=2853 with θin q iv, what is sin(θ)?

This graph shows a portion of an odd function. use the graph to complete the table of values. x f(x) −2 −3 −4 −6