The value of cos (2 cos –1 x + sin –1 x) at x = 1 5 is :
Mathematics · JEE Main · NTA Exams — Sets, Relations and Functions
The value of cos (2 cos–1 x + sin–1 x) at \(\mathrm{x}=\frac{1}{5}\) is :
- 1
- 3
- 0
- \(-\frac{2 \sqrt{6}}{5}\)
Answer
(D) - 2 6 5
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