please solve this question. ....
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According to given sum,
A+B+C=180
dividing both sides by 2
(A+B+C)/2=180/2
A/2+(B+C)/2=90
(B+C)/2=90-A/2
Adding both sides cos
cos (B+C)/2=cos(90-A/2)
cos (B+C)/2=sinA/2
so the ans is sinA/2 .
:-)Hope it helps u.
A+B+C=180
dividing both sides by 2
(A+B+C)/2=180/2
A/2+(B+C)/2=90
(B+C)/2=90-A/2
Adding both sides cos
cos (B+C)/2=cos(90-A/2)
cos (B+C)/2=sinA/2
so the ans is sinA/2 .
:-)Hope it helps u.
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