Try this thing which you can find on internet
I don’t know if that helps but here you go...
<u>Given</u>:
Given that O is the center of the circle.
AB is tangent to the circle.
The measure of ∠AOB is 68° and we know that the tangent meets the circle at 90°
We need to determine the measure of ∠ABO.
<u>Measure of ∠ABO:</u>
The measure of ∠ABO can be determined using the triangle sum property.
Applying the property, we have;

Substituting the values, we get;

Simplifying, we get;


Thus, the measure of ∠ABO is 22°
To check it we can use Pythagorean theorem.

, where c is the longest side.
Lets check it
Assume that a=10 and b= 24

Now lets compare with c^2=676
Its equal, so its right triangle.
Answer:
Now, the formulas for other trigonometry ratios are: Cot θ = 1/tan θ = Adjacent side/ Side opposite = AB/BC. Sec θ = 1/Cos θ = Hypotenuse / Adjacent side = AC / AB. Cosec θ = 1/Sin θ = Hypotenuse / Side opposite = AC /BC