Question

Prove that the curve y² =4ax and xy=c² cut at right angles if c⁴ =32a⁴?

I want to understand miscellaneous exercise of all chapters 

I can not understand that example 6 

The radius of circle is increasing at the rate of 0.1 cm per second determine the rate of change of area when radius of circle is 5 centimetre

The side of a square sheet of maths metal is increasing Airtel 3 cm per minute at what rate is the area increasing when the side is 10 cm long?

why -y is positive

Cbse class 12 ncert solutions

On dividing x3-3x+x+2 by polynomial g (x)the quotient and remainder were x-2 and -2x+4 respectively find g (x)

x=A cos(nt+a) से सरल आवर्त गति का समीकरण ज्ञात कीजिए