Transforming cos(2a) to tan(a)
A quick guide to converting the trigonometric identity cos(2a) into an expression involving tan(a). Inspired by a brief, enthusiastic explanation, this program aims to capture the same 'aha!' moment in a structured learning path. Expect a touch of humor and directness!
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Program Modules
What You'll Accomplish
- Recall the identity cos(2a) = cos²(a) - sin²(a)
- Understand the identity 1 = cos²(a) + sin²(a)
- Divide trigonometric expressions by cos²(a)
- Express trigonometric equations in terms of tan²(a)
- Experience the 'aha!' moment of this transformation
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