AP EAMCET Engineering 2018 Apr 22 Shift 1 Paper

Section: Mathematics

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Question : 21 of 160

Marks: +1, -0

If Cos(x−

π

3

),cos‌x,cos(x+

π

3

) are in a harmonic progression, then cos‌x=

3
2
1
√3
2
√
3
2

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