Final Answer
Step-by-step Solution
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I. Express the LHS in terms of sine and cosine and simplify
Start from the LHS (left-hand side)
Learn how to solve trigonometric identities problems step by step online.
Learn how to solve trigonometric identities problems step by step online. Prove the trigonometric identity 2cos(x)^2-1=1-2sin(x)^2. section:I. Express the LHS in terms of sine and cosine and simplify. Start from the LHS (left-hand side). Applying the pythagorean identity: \cos^2(\theta)=1-\sin(\theta)^2. Multiply the single term 2 by each term of the polynomial \left(1-\sin\left(x\right)^2\right).