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Question

Using the measurements given in the following figure:
Write an expression for $$AD$$ in terms of $$\theta$$.
1846776_4d988ee75aee47eb8782a3f9266d6d1a.png


Solution

$$\sec \ \theta= \dfrac{AD}{AE}$$
$$\sec \ \theta = \dfrac{AD}{9}$$
$$AD= 9 \ \sec \ \theta$$

Mathematics

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