It looks like you've uploaded a document that includes various trigonometry practice questions, specifically focusing on trigonometric identities, angle calculations, and triangle properties. There are several sections with both multiple-choice and short-answer questions.

How can I assist you with the content from this file? Would you like to work through any specific problems or explanations on a certain topic?

Here are a few examples of questions found in the document:

1. What is the value of the expression $\sin 30^\circ \cos 60^\circ + \sin 60^\circ \cos 30^\circ$?
2. How do you calculate the cosine of an obtuse angle?
3. What is the formula for the area of a triangle given two sides and the included angle?
4. How do you simplify trigonometric expressions involving sums of sines and cosines?
5. How do you apply the law of sines to solve triangles?

Tip: When solving trigonometric expressions, it's helpful to remember the exact values for standard angles like 30°, 45°, 60°, and 90°.

Let me know which question you'd like to tackle or if you need clarification on any topic!