We're doing this reflection thing. and 3 different questions, i have no clue how to do it. 1) reflection across the y-axis, 2) reflection across the x-axis. 3) reflection across y=1.

You basically need to reflect the coordinates that are given.

(Not sure if you're asking how to do it)

Step-by-step explanation:

For example:

(5,8) Reflect across the y-axis (-5,8)

(5,8) Reflect across the x-axis (5,-8)

intensity of the vector is v= √37 ≈ 6.08 units and make angle ∡α ≈ 9.46° with east direction

step-by-step explanation:

required vector is consists of the two componentsvx= 2+4=6 units   and vy= 1 unit and vx ⊥ vywe will use pythagorian theorem to find intensity of the vector vv∧2 = vx∧2 + vy∧2 => v = √vx∧2 + vy∧2 = √6∧2 + 1∧2 = √36+1 = √37 ≈ 6.08 unitsthe angle ∡α between vector and east direction we wil find with tanαtanα = 1/6 => α = arc tanα = arc 1/6 => α ≈ 9.46°

hope this