# Thread: can anyone help me with trig? asap?

1. ## can anyone help me with trig? asap?

question= two forcesm one of 120 lbs and the other of 200 lbs, act on the same object at angles of 30 degrees and -30 degrees (respectively) with the positive x-axis. find the direction and magnitude of the resultant of these 2 forces

2. Originally Posted by kballa
question= two forcesm one of 120 lbs and the other of 200 lbs, act on the same object at angles of 30 degrees and -30 degrees (respectively) with the positive x-axis. find the direction and magnitude of the resultant of these 2 forces
we have magnitude and direction, so we should be thinking vectors here.

draw a diagram showing the Cartesian axis and your vectors.

Let $F_1$ be the vector that represents the force of 120 lbs
and $F_2$ be the vector representing the 200 lbs

then the resultant force $F$ is given by: $F = F_1 + F_2$

i suppose you will know how to draw these vectors.

let $$ be the terminal point of $F_1$

and $$ be the terminal point of $F_2$

so, we would have $F = = $

once we have $$ we can figure out what is required of us.

can you continue? do you even know what i am talking about?