Find the Measure of the Third Angle of a Triangle $\mathrm { T }$

question 161

Multiple Choice

Find the measure of the third angle of a triangle if the measures of the other two angles are given.
-For what angle $\mathrm { T }$ is $\cos \mathrm { T } \approx 0.423$ ? (Assume $0 ^ { \circ } \leq \mathrm { T } \leq 90 ^ { \circ }$ .)

• A) \(0.423 ^ { \circ }\)
• B) \(65 ^ { \circ }\)
• C) \(51.917 ^ { \circ }\)
• D) \(25 ^ { \circ }\)

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