The image has been opened. Now, I will analyze the problem using circle theorems and provide a solution.

Problem Overview:

We have a diagram involving a circle with several intersecting lines and angles:

1. A circle with center $O$.
2. Points labeled on the circle.
3. Line $ST$ is tangent to the circle.
4. Angle $\angle ACB = 48^\circ$ and $\angle CBO = 17^\circ$.

Step-by-step approach:

1. Tangent-Radius Theorem: A tangent to a circle is perpendicular to the radius drawn to the point of tangency. This could help if a tangent-angle relationship is needed.
2. Angle at the Center vs Angle at the Circumference: The angle subtended by an arc at the center is twice the angle subtended at the circumference.
3. Other Theorems: Cyclic quadrilateral properties or alternate segment theorems may apply.

Let me now calculate the angles.Given the details from the image, let's apply the following Circle Theorems to solve the problem:

1. Tangent-Radius Theorem: Line $ST$ is tangent to the circle, meaning that the angle between the radius $OT$ and the tangent is $90^\circ$.

2. Angle at the Center vs Angle at the Circumference:

   • Since $\angle ACB = 48^\circ$, and $ACB$ is subtended by an arc at the circumference, the angle subtended by the same arc at the center, $O$, would be $2 \times 48^\circ = 96^\circ$.

3. Cyclic Quadrilateral: If the points lie on the circle, opposite angles of a cyclic quadrilateral sum to $180^\circ$. If applicable, this property could be used to find other unknown angles.

4. Angle Calculation:

   • The given $\angle CBO = 17^\circ$ can help calculate other related angles using the Alternate Segment Theorem.

Would you like to clarify any part of the theorem or calculation process? Here are some related questions:

1. How does the tangent-radius theorem apply to circle geometry?
2. What is the significance of the angle at the center compared to the angle at the circumference?
3. How does the cyclic quadrilateral property assist in finding unknown angles?
4. Can the alternate segment theorem be used to calculate angles involving a tangent?
5. Why is $\angle ACB$ relevant in determining $\angle CBO$?

Tip: Always look for tangent or radius relationships in circle theorems to simplify complex problems.