Q31 In a triangle ABC, if
1 1 1
1+cosA 1+cosB 1+cosC
cosA+cos2A cosB+cos2B cosC+cos2C


=0,then prove that ABC is an isosceles triangle

Solution


,

Reach Us

SERVICES

  • ACADEMIC
  • ON-LINE PREPARATION
  • FOUNDATION & CRASH COURSES

CONTACT

B-54, Krishna Bhawan, Parag Narain Road, Near Butler Palace Colony Lucknow
Contact:+918081967119