Use a calculator to evaluate the trigonometric function $\cos 400 ^ { \circ }$ to four decimal places.
A)-1.0827
B)1.1918
C)-0.9236
D)0.7660
E)0.8391

Name: Use a calculator to evaluate the trigonometric function $\cos 400 ^ { \circ }$ to four decimal places. A)-1.0827 B)1.1918 C)-0.9236 D)0.7660 E)0.8391
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Question

Quizplus · Accepted Answer

The angle 400° is equivalent to 40° in the first quadrant (since 400° - 360° = 40°). The cosine of 40° is approximately 0.7660.

Use a Calculator to Evaluate the Trigonometric Function cos⁡400∘\cos 400 ^ { \circ }cos400∘

Use a Calculator to Evaluate the Trigonometric Function $\cos 400 ^ { \circ }$