Question

If coso 5/13, find the value of
sin square theta minus cos square theta by 2sin theta into cos theta =3/5​

Answer 1

Given, cosθ=135

Then sinθ=1312

Hence, tanθ=512 and

cosecθ=1213

Substituting in the equation, we get 

=1213−135135+125.5

=13(13)−5(12)5(12)+25(13)

=169−6060+300+25

=109385