I COULD REALLY USE SOME HELP!!! WILL GIVE MEDALS!!!! PLEASE!!!! 1. Find the angle between the given vectors to the nearest tenth of a degree. u = , v = and 2. Let u = , v = . Find -2u + 4v.

Question

I COULD REALLY USE SOME HELP!!! WILL GIVE MEDALS!!!! PLEASE!!!! 1. Find the angle between the given vectors to the nearest tenth of a degree. u = <-5, 8>, v = <-4, 8> and 2. Let u = <-4, 1>, v = <-1, 6>. Find -2u + 4v.

anonymous · Answer

psh.. nice question

anonymous · Answer

@dan815 I've seen your work i know you're good can you help me out??

anonymous · Answer

@nincompoop can you help me out??

amistre64 · Answer

the usual approach for the first one is to use the dot product equivalent

amistre64 · Answer

$$|u||v|\cos(a)=u\cdot v$$

amistre64 · Answer

the second one is just multiplication and addition ..

anonymous · Answer

Is the first one 15.4 degrees??

amistre64 · Answer

a - b = tan^(-1)(-8/5) - tan^(-1)(-8/4)

im going to go with no, assuming you didnt make a typo