in a triangle abc , cos A+cos B=4 [ sin(C/2)]^2....
then sides a,b,c are in ap/gp/hp/none
in a triangle abc , cos A+cos B=4 [ sin(C/2)]^2....
then sides a,b,c are in ap/gp/hp/none
rahul agrwl , 12 Years ago
Grade 12
Trigonometry> life-is-becoming-prosaic-lets-add-some-pu...
1 Answers
jitender lakhanpal
hi rahul
answer -- A.P
for explanation PFA
Approved Last Activity: 12 Years ago
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