Find the value of cos 315° rounded to four significant digits.
A) 0.7071
B) 0.2536
C) 0.4071
D) -0.5000
E) 0.3536

Name: Find the value of cos 315° rounded to four significant digits. A) 0.7071 B) 0.2536 C) 0.4071 D) -0.5000 E) 0.3536
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Question

Quizplus · Accepted Answer

Cos 315° is equivalent to cos(360° - 45°), which simplifies to cos 45°. The exact value of cos 45° is √2/2, which is approximately 0.7071 when rounded to four significant digits.

Find the Value of Cos 315° Rounded to Four Significant