What is the measure of the angle between v = and w = ?

Question

What is the measure of the angle between v = <4, 0> and w = <6, 1>?

amistre64 · Answer

by definition:
$$|\vec u||\vec v|\cos\alpha=\vec u\cdot\vec v$$

amistre64 · Answer

soo, divide and inverse cosine to determine alpha

anonymous · Answer

i still dont understand

amistre64 · Answer

then you may want to review your material to determine how to do a dot product operation, and also to find the length of a vector.

amistre64 · Answer

otherwise, this amounts to trig identites

amistre64 · Answer

say:

angle c = angle b - angle a

sin(c) = sin(b-a)
           = sinb cosa - sina cosb

anonymous · Answer

im doing an online class to get ahead in high school for i dont have to take it my senior year so i really dont have anything to study

anonymous · Answer

i understand it this far

amistre64 · Answer

but you have to have some knowledge base to work with.  you understand the triggy part?

anonymous · Answer

yeah i understand that part

amistre64 · Answer

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