1.

If angles A,B,Care in A.P . , then2cos (( A-C)/( 2))=

Answer»

`( a+c) /(SQRT(a^(2) - ac+ c^(2)) `
` ( a+c) /( sqrt(a^(2) + ac+ c^(2))`
` ( a+c) /( sqrt( a^(2) - ac-c^(2))`
` ( a+ c)/( sqrt( a^(2) + 2AC -c^(2))`

ANSWER :A


Discussion

No Comment Found