Answer :
Given:
Curves +
1 ...(1)
& +
1 ...(2)
First curve is +
1
Differentiating above w.r.t x,
⇒ .
= 0
⇒ .
⇒
⇒ m1 ...(3)
Second curve is +
1
Differentiating above w.r.t x,
⇒ .
= 0
⇒ .
⇒
⇒ m2 ...(4)
Now equation (1) – (2) gives
⇒ x2() + y2(
) = 0
⇒ x2() = – y2(
)
⇒
⇒
⇒
⇒
⇒
⇒
⇒
⇒ ...(5)
When m1 & m2 =
⇒ ×
⇒ ×
Substituting from equation (5),we get
⇒ ×
⇒ – 1
∴ The two curves intersect orthogonally,
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