- #1
Miike012
- 1,009
- 0
Homework Statement
Can some one please give me the proof or somewhere I can find the proof or just an explanation why
Sin(-theta) = -Sin(theta
Cos(-theta) = cos(theta)
Tan(-theta)= -Tan(theta)
Thank you..
Proving trigonometric identities is important because it allows us to manipulate and simplify complex trigonometric expressions, making them easier to solve and understand.
Trigonometric identities can be proven using various mathematical techniques such as algebraic manipulation, substitution, or the use of trigonometric identities and properties.
Verifying a trigonometric identity involves substituting values for the variables and checking if the given identity holds true. Proving a trigonometric identity involves using mathematical techniques to show that the identity is always true, regardless of the values substituted.
An example of a trigonometric identity is sin²θ + cos²θ = 1. This identity is known as the Pythagorean identity and holds true for all values of θ.
Understanding trigonometric identities is essential in solving complex mathematical problems involving trigonometric functions. It also helps in the development of new mathematical concepts and theorems.