BUKTIKAN (sin A/1+COS A)+(SIN A/1+COS A)=2.COSEC A

(sin A/1+COS A)+(SIN A/1-COS )
=> sin((1+ cos a) +(1-cos a)/(1+cos)(1- cos a)
=>sin(2) / 1- cos ^2
=> 2 sin a / sin^2 a
=> 2/ sin a
=> 2cosec a

gak jelas tanyaaaa . . . . . .. . . . . .