Final answer to the problem
true
Step-by-step Solution
How should I solve this problem?
- Prove from LHS (left-hand side)
- Prove from RHS (right-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 left-hand side (LHS) of the identity
$\cos\left(a\right)^2-\sin\left(a\right)^2$
Learn how to solve trigonometric identities problems step by step online.
$\cos\left(a\right)^2-\sin\left(a\right)^2$
Learn how to solve trigonometric identities problems step by step online. Prove the trigonometric identity cos(a)^2-sin(a)^2=1-2sin(a)^2. Starting from the left-hand side (LHS) of the identity. Applying the pythagorean identity: \cos^2(\theta)=1-\sin(\theta)^2. Combining like terms -\sin\left(a\right)^2 and -\sin\left(a\right)^2. Since we have reached the expression of our goal, we have proven the identity.
Final answer to the problem
true
