Question
Sun September 29, 2013 By: Hasin Mahsool
in an acute angled triangle abc if sin(a+b-c)=1/2 and cos(b+c-a)=1/

in an acute triangle if sin(a+b-c)=1/2and cos(b+c-a)=1/

Expert Reply
Faiza Lambe
Sun September 29, 2013

Given, sin (A + B – C) =   and cos (B + C – A) =

 

From angle sum property of triangle, we have,

 

On subtracting (2) from (1), we get

 

On putting value of C in (1), we get

A + B = 105° ....... (3)

Adding (2) and (3), we get

 

On putting value of B in (2), we get

 

Home Work Help