Question

This image of a physics problem shows a block resting on a ramp, PQ¯¯¯¯¯. ∠P is the angle between the ramp and the horizontal, and BW−→− is oriented vertically. Which quantity is equal to cos W?

sin P

cos P

1 − sin P

1 − cos P

Answer 1

I think we need to find another angle equal to angle W.

Answer 2

is there an angle in triangle containing < P = <W?

Answer 3

these are my answer choices though:

A) sin P
B) cos P
C) 1 − sin P
D) 1 − cos P

Answer 4

yes - thats why we need to look for angles equal to angle W that are in the small triangle containing <P

Answer 5

angle P is smaller than angle W

Answer 6

note that angle W and angle WBN add up to 90 degrees

Answer 7

yes < P is maller but there are other angles in that triangle

Answer 8

okay