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Use the Properties of the Trigonometric Functions to Find the Exact

question 125

Multiple Choice

Use the properties of the trigonometric functions to find the exact value of the expression. Do not use a calculator.
- sec⁡240∘−tan⁡240∘\sec ^ { 2 } 40 ^ { \circ } - \tan ^ { 2 } 40 ^ { \circ }

Definitions:

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