Q.
Statement-1: If the angle between two asymptotes of a hyperbola x2a2−y2b2=1 is π3 its eccentricity is 23.Statement 2: Angles between the asymptotes of the hyperbola x2a2−y2b2=1 are 2tan−1ba or π−2tan−1ba.
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a
STATEMENT-1 is True, STATEMENT-2 is True; STATEMENT-2 is a correct explanation for STATEMENT-1
b
STATEMENT-1 is True, STATEMENT-2 is True; STATEMENT-2 is NOT a correct explanation for STATEMENT-1
c
STATEMENT-1 is True, STATEMENT-2 is False
d
STATEMENT-1 is False, STATEMENT-2 is True
answer is C.
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Detailed Solution
Equation of the asymptotes is xa±yb=0And if θ is an angle between the asymptotes tan θ =2ba1+b2a2=2tanϕ1+tan2ϕ where ϕ=tan−1ba=tan2ϕ⇒θ=2ϕ=2tan−1ba and the statement-1 is true. Using in statement-1. If π3=2tan−1ba⇒tanπ6=ba⇒3b2=a2⇒3e2−1=1⇒e=23 If π3=π−2tan−1ba⇒ba=tanπ3=3⇒b2=3a2⇒e2−1=3⇒e=2Showing that statement-1 is false
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