AP and TS EAMCET Engineering Model Paper 4

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Question : 13 of 160

Marks: +1, -0

cos‌x

cos(x−2y)

=λ⇒tan(x−y).tan‌y=

1+λ
1−λ
1−λ
1+λ
λ
1+λ
λ
1−λ

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