Question

NEED HELP NOW! Medal & Fan!
TRIG RATIOS!

Answer 1

The first step would to be plug in your known values. What equations and knowns does the question give you?

Answer 2

It only tells me what thada is

Answer 3

I'm so confused

Answer 4

so you have the equation : \[\cos \theta=\sqrt{\frac{ Lt }{ Lo }}\]

Right? So start by plugging in theta =45 degrees

Answer 5

right

Answer 6

cos(45degrees) = 0.707107

Answer 7

That's a start, now how would we get ride of the square root?

Answer 8

square both sides?

Answer 9

Great! And then you just have to split up that fraction somehow and I think you got yourself an equation for the relationship between Lo and Lt. :)

Answer 10

okay so then i would times both sides by Lo? right?

Answer 11

Exactly!

Answer 12

so the answer is B. right!?
thank you so much! this makes so much more sense!

Answer 13

Well if you want to check your answer, you can always doing that by plugging it into the original equation.