Lemma
MediumUnit circle
OpenStax, Algebra and Trigonometry 2e §7.4 The Other Trigonometric Functions · Review Exercise 97 · Trigonometry · Unit circle

The Other Trigonometric Functions · Review Exercise 97

Use side lengths to evaluate.

csc \left(18°\right) = sec \left(___°\right)

This exercise has fill-in blanks from its source book and no answer key.

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OpenStax, Algebra and Trigonometry 2e · §7.4 The Other Trigonometric Functions · Review Exercise 97

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Checked against the answer in OpenStax, Algebra and Trigonometry 2e.