Question

∆ABC, tan (A-B)/2 tan c/2 =?​

Answer 1

Step-by-step explanation:

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Answer 2

Answer:

Step-by-step explanation:

             $\huge\boxed{SOLUTION}$

             

(a+b)/2=90* -c/2

so tan[(a+b)/2]=tan(90*-c/2)=cot(c/2) but

cot(c/2)=1/tan(c/2) so

tan[(a+b)/2]=1/tan(c/2) so

tan[(a+b)/2].tan(c/2)=1

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