Given the vector u equal to 3 (cos 280º, sin 280°) and vector v equal to 5 (cos 215°, sin 215°), find the sum u + v and write your answer in magnitude

and direction form with the magnitude rounded to the nearest tenth and the

direction rounded to the nearest degree, 0º = 0 < 360°.

where is the triangle?

step-by-step explanation:

x = -5

step-by-step explanation:

step-by-step explanation:

this can be solved first with pythagorean theorem, which tells us to square both legs of the triangle and sum it. this will be equal to the square of the hypotenuse.

the hypotenuse is the side "opposite" the 90 degree angle, which is x.

so we can write using pythagorean theorem,

simplifying:

to further simplify this radical, we need to use the property  

thus