Question

can u explain how 1/sint changed like that? any formulas? plz explain​

Answer 1

Step-by-step explanation:

it is the formula for sin2t.

sin2t = 2tant/1 + tan²t.

now divide the angle by 2

sin2t/2 ( both the 2 get cancelled)

so

sint = 2tant/2 / 1 + tan²t/2.

Answer 2

Step-by-step explanation:

hope this will help you