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Without Using a Calculator, Give the Exact Trigonometric Function Value $\sqrt { 2 }$

Question 138

Multiple Choice

Without using a calculator, give the exact trigonometric function value with rational denominator.
-sec 45

A) $\sqrt { 2 }$
B) 1
C) $\frac { 1 } { 2 }$
D) $\frac { 2 \sqrt { 3 } } { 3 }$ °

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