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AP EAMCET Engineering 2016 Code C Paper

Section: Mathematics
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Question : 80 of 160
 
Marks: +1, -0
In ΔABC, if x=tan(
B−C
2
)tan
A
2
,y=tan(
C−A
2
)tan
B
2
 and z=tan(
A−B
2
)tan
C
2
 then (x+y+z)=
Validate
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