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Prove the trigonometric identity $\cos\left(2\cdot \infty \right)=1-2\cdot \sin\left(\infty \right)^2$

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Solution

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Final answer to the problem

true

Step-by-step Solution

How should I solve this problem?

  • Prove from RHS (right-hand side)
  • Prove from LHS (left-hand side)
  • Express everything into Sine and Cosine
  • Exact Differential Equation
  • Linear Differential Equation
  • Separable Differential Equation
  • Homogeneous Differential Equation
  • Integrate by partial fractions
  • Product of Binomials with Common Term
  • FOIL Method
  • Load more...
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1

Starting from the right-hand side (RHS) of the identity

Learn how to solve proving trigonometric identities problems step by step online.

$1-2\sin\left(\infty\right)^2$

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Learn how to solve proving trigonometric identities problems step by step online. Prove the trigonometric identity cos(2infinity)=1-2sin(infinity)^2. Starting from the right-hand side (RHS) of the identity. Applying an identity of double-angle cosine: \cos\left(2\theta\right)=1-2\sin\left(\theta\right)^2. Since we have reached the expression of our goal, we have proven the identity.

Final answer to the problem

true

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Plotting: $true$

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Main Topic: Proving Trigonometric Identities

To prove a trigonometric identity, you have to show that one side of the equation can be transformed into the other side.

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