If 0.5 i +0.8 j + c k is a unit vector, then the value of c is

Physics · JEE Main · NTA Exams — Physics and Measurement

1. \(\sqrt{0.11}\)
2. \(\sqrt{0.22}\)
3. \(\sqrt{0.33}\)
4. \(\sqrt{0.89}\)

Answer

(A) 0.11

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