Final Answer
Step-by-step Solution
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Starting from the left-hand side (LHS) of the identity
Applying the trigonometric identity: $\sec\left(\theta \right)^2 = 1+\tan\left(\theta \right)^2$
Learn how to solve trigonometric identities problems step by step online.
$\sec\left(20\right)^2$
Learn how to solve trigonometric identities problems step by step online. Prove the trigonometric identity sec(20)^2=tan(20)^2+1. Starting from the left-hand side (LHS) of the identity. Applying the trigonometric identity: \sec\left(\theta \right)^2 = 1+\tan\left(\theta \right)^2. Since we have reached the expression of our goal, we have proven the identity.