Sin a = 0,28, cos a = 0,96

To find the values of sin(a) and cos(a), we can use the trigonometric identity:

sin^2(a) + cos^2(a) = 1

Given that sin(a) = 0.28 and cos(a) = 0.96, we can substitute these values into the identity:

(0.28)^2 + (0.96)^2 = 0.0784 + 0.9216 = 1

As the sum equals 1, we can conclude that the given values for sin(a) and cos(a) are correct.