If sin theta =a/b and theta lies in first quadrant, find all t-ratios.

Answer 1

given:
sinØ = a/b
so y = a , x = ?
r = b

r^2 = x^2 + y^2
b^2 = x^2 + a^2
since we are in quad I,
x = +√(b^2 - a^2)

now use your definitions to state the trig ratios