Question

solve ques 28......​

Answer 1

Answer:

A + B + C =180

B+C=180-A........(1)

sub (1) in question

cosec^2(180-A/2)- TAN^2(A/2)=cosec^2(180/2-a/2)- TAN^2(A/2)

cosec^2(90-a/2)-tan^2(a/2)                                     cosec a=(90- a)=sec a

sec  ^2(a/2)-tan(a/2)=1                                            sec^2a-tan^2a=1

hope u understand sorry for delay

Step-by-step explanation:

Answer 2

Dekh le pgl........☹️☹️