#### In real-world, there are multiple measurements that we must know for knowledge such as the height of mountain, mass of earth, and its distance from the sun. Similarly, there are many impossible problems that we need mathematical formulas to find the answers. That's why people use trigonometric formulas to find mathematical proofs to have real-world apps for centuries. Also, people use different formulas, tools, measurement equipment to measure long distances. The usage of trigonometric entities involves postulates and specific equations. These are perfect to put it into the equations with innumerable apps. In the past, in 950 AD, there was a Persian astronomer reveals discover trigonometric terms. Also, there were an ancient Greek expert that found geometric formulas and states all of them in terms of chords. For all values added to the equations, these formulae are special postulates or equations that includes innumerable apps. Use sum of formulas and explain their difference for cosine. All related techniques will help you in solving problems. Those issues will include all things I mentioned above. Only you will need to simplify various trigonometric expressions and equations. Find the value of tangent, cosine, sine of the any angle as it is the easiest way to solve all things within short time.

In these worksheets, students will find the exact value of specified angles. They will work with double angle formulas and half angle formulas. This set of worksheets contains step-by-step solutions to sample problems, both simple and more complex problems, a review, and a quiz. It also includes ample worksheets for students to practice independently. When finished with this set of worksheets, students will be able to find the sums and differences of angles. These worksheets explain how to find the sums and differences of angles. Sample problems are solved and practice problems are provided.