Answer:
5/13
Step-by-step explanation:
R^2 = x^2 + y^2
x is cosine
y is sine
r is the value in the denominator (here it is 13)
Plug it in:
13^2 = 12^2 + y^2
169 = 144 + y^2
Subtract 144 from both sides:
169 - 144 = y^2
25 = y^2
Square root both sides:
y = 5
in other words, sin theta = 5/13
