plz solve this question..........
Attachments:
Answers
Answered by
1
♦ Hello ★
°.° A , B and C are interior angle
.°. A + B + C = 180°
=> B + C = 180° - A
=> B + C/2 = 180° - A/2
=> B + C /2 = 90° - A/2
=> sin ( B + C/2 ) = sin ( 90° - A/2 )
=> sin ( B + C/2 ) = cos ( A/2 )
====================================
°.° A , B and C are interior angle
.°. A + B + C = 180°
=> B + C = 180° - A
=> B + C/2 = 180° - A/2
=> B + C /2 = 90° - A/2
=> sin ( B + C/2 ) = sin ( 90° - A/2 )
=> sin ( B + C/2 ) = cos ( A/2 )
====================================
mdsadiq3:
thanx
ok
yes, i understand
Similar questions