Question

cosec theta upon cosec theta -1 + cosec theta upon cosec theta +1 =2sec²theta​

Answer 1

Answer:

Convert cosec into sin and then u'll get 2/1-sin²

using the identity cos²+sin²=1

2/cos²

using the identity 1/cos=sec

2*sec²

hence proved

Answer 2

coseca/coseca-1 + cosec a/coseca+1=1/1-sina + 1/sina=2/1-sin^2a =2/cos^2a =2sec^2a

Step-by-step explanation:

1)first of all convert coseca into sina using formula coseca= 1/sina 2) then after calculating you'll get next step 3) similarly in next step you'll get 2/1-sin^2a 4)then use the identity 1- sin^2a= cos^2a in denominator) 5) at last use identity 1/cosa=seca then you'll get there. hope it helps you