Question

please solve 19th question with full explanation ​

Answer 1

Answer:

x=a sin theeta

y=b tan theeta

a^2/x^2-b^2/y^2

=a^2/a^2sin^2 theeta-b^2/b^2tan ^2 theeta

=1/sin^2 theeta-1/tan^2 theeta

=cosec^2 theeta-cot^2 theeta

=1

(b) is the correct answer

Answer 2

Answer:

b)is the correct answer

if the answer is correct mark me as brainliest