If a ,b and c are interior angles of a triangle abc, then tan(a+b/2) is equal to
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Answer:
cot c/2
Step-by-step explanation:
a+b+c=180(interior angles)
a+b=180-c
a+b/2=90-c/2
tan(a+b/2)=tan(90-c/2)
tan(a+b/2)=cot c/2
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