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1.3. \( \frac{1}{\cos ^{2} \theta}-1 \)

Ask by Edwards Phillips. in South Africa
Mar 09,2025

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The expression simplifies to \( \tan^{2} \theta \).

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Bonus Knowledge

Did you know that the expression \( \frac{1}{\cos ^{2} \theta}-1 \) can be simplified using fundamental trigonometric identities? By recognizing that \( \frac{1}{\cos^{2} \theta} \) is equal to \( \sec^{2} \theta \), you can rewrite it as \( \sec^{2} \theta - 1 \), which simplifies further to \( \tan^{2} \theta \). This nifty transformation bridges your knowledge of secant and tangent! In practical applications, using these trigonometric identities can help in various fields such as physics, engineering, and computer graphics, where angles and distances are key. For instance, when calculating the trajectory of a projectile, knowing how to manipulate these functions makes it easier to find the right angle for maximum distance or height. So next time you're working on a real-world problem, remember these relationships could make your calculations smoother!

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