Question

plz answer these 3ques

Answer 1

the second one is incomplete
the full question is
sin48×sec42+cos48×cosec42
if the question is the above one then my answer of second is correct

thanks for asking the question answer is in the picture

Answer 2

Answer:

Step-by-step explanation:

Cos70/cos70+cosec20/cosec20-2sin20×1/sin20=0

2-2=0

0=0.