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Tangents drawn from the point `(c,d)` to the hyperbola `(x^(2))/(a^(2))-(y^(2))/(b^(2))=1` make angles `alpha` and `beta` with the `x`-axis. If `tanalphatanbeta=1`, then `c^(2)-d^(2)=`

A

73

B

55

C

64

D

9

Text Solution

Verified by Experts

The correct Answer is:
a
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