Trigonometry is a branch of mathematics that deals with the relationships between the angles and sides of triangles. The fundamental trigonometric functions, such as sine, cosine, and tangent, are defined based on these angles. Without an angle measurement, it becomes challenging to solve specific trigonometric problems directly. However, there are a few scenarios where you can still work with trigonometry without knowing the angle itself. Here are a few approaches:

1. Ratios and Proportions: Trigonometry is based on the ratios of sides of a right triangle. If you have the lengths of two sides, you can calculate the ratio of those sides (e.g., opposite/hypotenuse, adjacent/hypotenuse) and express it as a fraction or decimal. This ratio can still be useful in certain contexts, such as comparing the lengths of different sides or solving problems involving proportions.
2. Trigonometric Identities: Trigonometric identities are equations that relate the trigonometric functions to each other. These identities hold true regardless of the specific angle values. By using these identities, you can manipulate trigonometric expressions, simplify them, or solve equations involving trigonometric functions.
3. Laws of Sines and Cosines: The Law of Sines and the Law of Cosines are two important tools in trigonometry that can be used to solve triangles without knowing a specific angle. These laws relate the lengths of the sides of a triangle to the sines and cosines of the angles. By knowing the lengths of certain sides, you can apply these laws to find the lengths of other sides or angles within the triangle.
4. Trigonometric Equations: Trigonometric equations involve trigonometric functions and may or may not involve specific angle values. In some cases, you can still solve these equations algebraically or numerically, even without knowing the angles involved. This may require using numerical methods or solving equations iteratively.

It’s important to note that while these techniques allow you to work with trigonometry without knowing the exact angles, they might not provide a unique solution. The solutions obtained may be in terms of variables or involve multiple possibilities, depending on the context of the problem.