Question

8th one answer plz.. only who know they answer.. and send correct one​

Answer 1

Answer:

Step-by-step explanation:

1) sec35/cosec55

   using the identity cosecA=sec(90-A)

    sec35=cosec55

   ⇒sec35/cosec55=1

2)cos12-sin78

  using the identity cosA=sin(90-A)

  cos12=sin78

  ⇒cos12-sin78=0

3)tan26*tan(90-26)

  =tan26*tan64

 =tan26*cot26   [from the identity tanA=cot(90-A)]

=1