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## Question

Use a linear approximation to estimate cos29

## Answer

## Knowledge

1. Linear approximation: Using the tangent line to approximate the value of a function near a specific point.

2. Trigonometric functions: Understanding the properties and behavior of trigonometric functions such as cosine and sine.

3. Derivatives: Knowing how to find the derivative of a function, in this case, the derivative of the cosine function.

4. Angle measurement: Understanding the concept of angles and their measurement in degrees or radians.

5. Algebraic manipulation: Performing basic algebraic operations to simplify expressions and solve for unknowns.

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