- #1
lep11
- 380
- 7
Homework Statement
cos 2x-cos^2 x=0
The Attempt at a Solution
I have no idea.
BloodyFrozen said:Try getting everything in terms of ##cos^{2}{x}##
What is ##cos(2x)## equaled to? Hint. Double angle identity.
lep11 said:cos2x=2cos^2 -1
Therefore 2cos^2 x -1 -cos^2 x=0
How to continue?
A tricky trigonometric equation is a mathematical equation that involves trigonometric functions, such as sine, cosine, and tangent, and may require advanced techniques to solve.
Solving a tricky trigonometric equation requires knowledge of trigonometric identities and techniques such as substitution, factoring, and trigonometric identities. It may also involve using a calculator or computer program.
Trigonometric equations can be considered tricky because they often involve multiple trigonometric functions and may require creative problem-solving techniques to solve. Additionally, they may have multiple solutions or no real solutions.
One example of a tricky trigonometric equation is sin(x) + 2cos(x) = 3. This equation involves both sine and cosine functions and cannot be solved using basic algebraic techniques.
Solving tricky trigonometric equations can be useful in various fields, such as engineering, physics, and astronomy, where trigonometric functions are commonly used to model and solve real-world problems. It can also improve problem-solving skills and critical thinking abilities.