Question

Consider the vector v=(-6, 13).... Please help if u are good with vectors...?
Consider the vector v=(-6, 13).
Part 1: Use the dot product to find the angle (in degrees) between v=(-6, 13) and the vector (1,0). i think the answer is -6

Part 2: Write v in the form (absolutevalueof v costheta, absolutevalueof v sintheta) Express the angle theta in degrees.

Part 3: Use the dot product of the vectors v=(-6,13) and w=(-42,-34) to determine if they are orthogonal.

Answer 1

-6 + 0 = -6
angle = cos^-1 (sqroot(6^2) / ( (sqroot(6^2 + 13^2) x sqroot(1^2) )

Answer 2

thats just part 1

Answer 3

ok so part 1 is -6 @javawarrior

Answer 4

are you saying the angle is -6 degrees?