Gujarati
10-2. Parabola, Ellipse, Hyperbola
medium

दीर्घवृत्त $\frac{{{x^2}}}{{{a^2}}} + \frac{{{y^2}}}{{{b^2}}} = 1$ के बिन्दु $(a\cos \theta ,\;b\sin \theta )$ पर अभिलम्ब का समीकरण होगा

A

$\frac{{ax}}{{\sin \theta }} - \frac{{by}}{{\cos \theta }} = {a^2} - {b^2}$

B

$\frac{{ax}}{{\sin \theta }} - \frac{{by}}{{\cos \theta }} = {a^2} + {b^2}$

C

$\frac{{ax}}{{\cos \theta }} - \frac{{by}}{{\sin \theta }} = {a^2} - {b^2}$

D

$\frac{{ax}}{{\cos \theta }} - \frac{{by}}{{\sin \theta }} = {a^2} + {b^2}$

Solution

(c) $ax\sec \theta  – by{\rm{ cosec}}\theta  = {a^2} – {b^2}$.

(दीर्घवृत्त के प्राचल बिन्दुओं पर स्पषी का सूत्र देखें)

Standard 11
Mathematics

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