Question

Prove that 1+costheta/sintheta =cot theta /2

Answer 1

Step-by-step explanation:

here

1+cos0. cot(0)/2

__________=

sino

here 1+cos0=2cos^2(0/2)

and sino= 2sin(0/2).cos(0/2)

1+ cos0. 2 cos(0/2)×cos(0/2)

--------------=------------------------------------

sin0 2sin(0/2)×cos(0/2)

then. cos(0/2)

-----------------=cot(0)/2. RHS proved

sin(0/2)