Question

sin a + cosec a= 2 then sin^2 a + cosec^2 a =?.
only correct answer .
otherwise reported.​

Answer 1

Answer:

sin a + cosec a = 2

both side square

(sin a + cosec a)^2 = (2)^2

sin^2 a + cosec^2 a + 2sina coseca = 4

sin^2 a+ cosec^2 a = 4 - 2 sina* 1/sina

= 4-2

=2