Use the Cofunction Identities to Evaluate the Expression Without Using $\tan ^ { 2 } 71 + \cot ^ { 2 } 18 - \sec ^ { 2 } 72 - \csc ^ { 2 } 19$

question 13

Multiple Choice

Use the cofunction identities to evaluate the expression without using a calculator. $\tan ^ { 2 } 71 + \cot ^ { 2 } 18 - \sec ^ { 2 } 72 - \csc ^ { 2 } 19$

• A) \(- 1\)
• B) 3
• C) 1
• D) \(- 2\)
• E) 2

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