ques. 8 Share with your friends Share 0 Brijendra Pal answered this Dear Student, cotB2cotC2= ss-bs-as-c×ss-cs-as-b= ss-aNow from the given b+c=3a a+b+c = 3a+a2s = 4a s = 2a Putting this we get =2a2a-a= 2 Regards -1 View Full Answer