We are given all three angles here:
Angle A =68 degrees
Angle B =90 degrees
Angle C =22 degrees.
Now let us calculate :
sin (A) = sin (68) = 0.927
cos (B) = cos (90) = 0
sin (B) = sin (90) =1
cos (C) = cos (22) = 0.927
tan (C) = tan(22) =0.4040
So we can see that sin (A) and cos (C) are both equal to 0.927.
So cos (C) is the correct option.
