Question

One plus cos a by sin a plus sin a by one plus cos a equal to two cosec a

Answer 1

1+cosa/sina +sina/1+cosa

proof,

cross multiplying we get (1+cosA)^2+sin^A=2cosecA(sinA+sinAcosA)

1+cos^2A+sin^2A+2cosA=2+2cosA

2=2

HP