TS EAMCET 2017 Code A Solved Paper

Section: Mathematics

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Question : 60 of 160

Marks: +1, -0

If tan‌θ1=k‌cos‌θ2, then

cos(θ1+θ2)

cos(θ1−θ2)

=

1+k
1−k
1−k
1+k
k+1
k−1
k−1
k+1

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