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TS EAMCET 14-Sep-2020 Shift 1 Solved Paper

Section: Mathematics
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Question : 22 of 160
 
Marks: +1, -0
θ and α lie in Q3. If cos(θ-α), cosθ, cos(θ+α) are in the harmonic progression, then cos‌θ‌sec
α
2
=
Validate
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