Question

(iii) x = a cosec 0+ b cot 0, y = a cosec 0-b cot O x + y/a^2 X - y/ b ^2
= 4 ​

Answer 1

Step-by-step explanation:

(x+y / a)'2 -(x-y / b)'2[putting the values we get]

=(2 a cosec theta/a)'2-(2 b cot theta/b)'2

=4 cosec'2 theta-4 cot'2 theta

=4(cosec'2 theta - cot'2 theta)

=4*1=4 PROVED