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AP EAMCET202315 May 2023Morning ShiftMathematicsTrigonometric Ratios & IdentitiesActual

If ( + ), and ( - ) are arithmetic progression, then ^2 =

Options

  1. A2
  2. B-2
  3. C-

Correct answer

3

Step-by-step solution

Since ( + ), , ( - ) are in A.P. aligned & Hence sec = 1 2 [ ( + )+ ( - )] & = 1 2 [ 2 ( + ) ( - ) ] & ( + ) ( - )= ^2 & ^2 - ^2 = ^2 & ^2 = ^2 1- =2 ^2 2 & ^2 =1- ^2 =1-2 ^2 2 & ^2 =- aligned

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