Evaluate the expression without using a calculator, and write your answer in radians. 
Definitions:
Trade
The exchange of goods and services between parties, which can occur within a country or internationally, driven by the principle of comparative advantage.
1960s
A decade known for significant cultural, political, and socio-economic changes worldwide.
1970s
A decade from 1970 to 1979 characterized by significant political, social, and economic changes worldwide.
1980s
A decade characterized by major geopolitical changes, advancements in technology, and notable cultural developments.
Q11: If <img src="https://d2lvgg3v3hfg70.cloudfront.net/TBX9354/.jpg" alt="If with
Q16: Identify the graph of the function
Q52: Prove the identity. <img src="https://d2lvgg3v3hfg70.cloudfront.net/TBX9354/.jpg" alt="Prove the
Q74: Write the following in terms of sin
Q76: Graph the unit circle using parametric equations
Q107: Use the quadratic formula to find all
Q114: Find the identical expression for the following.
Q120: If a projectile (such as a bullet)is
Q143: Find the identical expression for the following.
Q149: A lawn sprinkler is located at the