To find the value of sine, cosine, and tangent of a 651/2 degree angle, we need to use the trigonometric ratios.

First, we need to convert the angle to radians, since most calculators and trig tables use radians.

651/2 degrees = (651/2) x (π/180) radians

= 1.13446 radians (rounded to 5 decimal places)

Now, we can use the following trigonometric ratios:

sin(651/2) = sin(1.13446) ≈ 0.932

cos(651/2) = cos(1.13446) ≈ 0.362

tan(651/2) = tan(1.13446) ≈ 2.571

Therefore, the sine of a 651/2 degree angle is approximately 0.932, the cosine is approximately 0.362, and the tangent is approximately 2.571.