need to find magnitude and direction of force P & i dont really understand how when things move around how they get the angles and where to place them serious need of help!!!!!

Question

adunb8 · Answer

attachment

ganeshie8 · Answer

u can find the magnitude/length of P using cosine law

adunb8 · Answer

@ganeshie8 but how do you know when to use it ?? like sometimes you use inverse tan to find angle sometimes you just use law of sine ? how can you tell?

ganeshie8 · Answer

|dw:1389604445253:dw|