The value of cos( tan^ -1 (tan (15π/4))) is (a) -1/√2 (b) 0 (c)1/√2 (d)1/2√2 - Sarthaks eConnect | Largest Online Education Community
![SOLVED: Evaluate the sine, cosine, and tangent of the angle without using a calculator. a) -15pi/4 b) 480 degrees SOLVED: Evaluate the sine, cosine, and tangent of the angle without using a calculator. a) -15pi/4 b) 480 degrees](https://cdn.numerade.com/ask_previews/2851c15e-0084-4e08-8fd0-ce2d55b30f24_large.jpg)
SOLVED: Evaluate the sine, cosine, and tangent of the angle without using a calculator. a) -15pi/4 b) 480 degrees
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