Question

B+C
In triangle ABC, show that tan(B+C/2) = cotA/2
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Answer 1

Step-by-step explanation:

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Answer 2

we know that in triangle ABC

angleA+angleB+angleC=180

B+C=180-A

B+C/2=90-A/2

tan(B+C/2)=tan(90-A/2)

cotA/2