or 
divide both sides by 2
sinΘ = - 
Since the sin ratio is negative then Θ is in third / fourth quadrants
Θ = 
() = 
related acute angle
Θ = ( π + ) =
or Θ = ( 2π - ) =
The explicit formula is D. -4n + 15.
The 9 combinations that exist for two movements:
R,R
R,L
R,U *
L,R
L,L
L,U
U,R *
U,L
U,U
Walker would only be able to make it to (1,1) with only 2 of these combinations.
So if he were only allowed to make two movements, his chances of arriving at (1,1) would be 2/9.
The relation between the variables x and y is inverse. As y increases, the value of x decreases instead. Also, when the value of y decreases, the value of x increases. This variation is called indirect proportion. The opposite is called the direct variation.
