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Let alpha , beta , gamma parametric ang...

Let `alpha , beta , gamma ` parametric angles of 3 points P,Q and R respectively lying on `x^(2)+y^(2)=1 `. If the length of chords AP, AQ and AR are in GP where A is (-1,0), then then `cos(α/2),cos(β/2) and cos(γ/2)` are in

A

A.P

B

G.P.

C

H.P.

D

None of these

Text Solution

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The correct Answer is:
A, D
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