Use identities to find the exact value of indicated trigonom
     Use identities to find the exact value of indicated trigonometric function of the acute angle of theta.  Sin theta = squareroot 3/3, cost theta = 2/3  Find Tan theta 
  
  Solution
Acute angle means the angle which is less than 90 degree
so that means theta is in first quadrant
so tan(theta) is positive
tan(theta) = sin(theta)/cos(theta)
= [ sqrt(5)/3 ] / [ 2/3 ]
= sqrt(5) / 2

