buddy, here it is right here:
You know that the right angle is 90, and the other is 11. A triangle has 180 degrees inside, so 180-90-11 = 79. so angle C = 79.
Then Tan(-)=opp/adj, so tan79=opp/26...so find the tan of 79 and multiply it by 26. WHich gives you the opposite side, or AB.
(-) = theta.