Final answer to the problem
Step-by-step Solution
How should I solve this problem?
- Verify if true (using arithmetic)
- Express in terms of sine and cosine
- Simplify
- Simplify into a single function
- Express in terms of Sine
- Express in terms of Cosine
- Express in terms of Tangent
- Express in terms of Cotangent
- Express in terms of Secant
- Express in terms of Cosecant
- Load more...
To prove that an equation is not an identity, we only need to find one input at which both sides of the equation result in different values
Learn how to solve differential calculus problems step by step online.
Since we're dealing with trig functions, we can try with different angles as input, such as: $0^{\circ}, 30^{\circ}, 60^{\circ}, 90^{\circ}, 180^{\circ}...$
Learn how to solve differential calculus problems step by step online. Prove that cos(x)^3-3cos(x)=3cos(x)sin(x) is not an identity. To prove that an equation is not an identity, we only need to find one input at which both sides of the equation result in different values. If we try with the following value. After substituting the value and simplify on the left side, we get. After substituting the value and simplify on the right side, we get.