nuwanoo7 said:arda kona suthra use karala balapan................ sure ne......... try karala balapan....
madurax86 said:cos (80).cos(20)+sin(80).sin(20) = cos(80-20) = cos(60) ne

ela ganan karaya macho mokakda school ekamadurax86 said:(b) th (a) wage mai ne
cos(15); cos 2A sutharen gana puluwan
cos(2A) = 2*cos(A)^2-1 cos(30)=2*cos(15)^2-1 ne
sin(165)=sin(180-15)= -sin(15) ; cos(15) hewa ne eken gana
cos(75)=cos(90-15)=sin(15)
tan(30)=2tan(15)/(1-tan(15)^2)
tan(75)=tan(90-15)=cot(15)=1/tan(15)
man haduwa diga wadida manda lesi krama hitunoth ema karana



elane mamath 2009 A/L karanawa habai danatamath owa mathaka neeeeeeeeeemadurax86 said:


shan_n95 said:machn cos 15 mehema aran hadanna baridha...
cos 15= cos 45-30 kiyala..passe ekata cosa.cosb=sina.sinb daanna baridha..man ehema hadhanna gihin suluwennatiwa inne
agrmrs said:elane mamath 2009 A/L karanawa habai danatamath owa mathaka neeeeeeeeee![]()
bithiye gahagana print karala heheoyalage results out une nadda thamamadurax86 said:mataka na kiyala ba ne hehe man 2008 kale...owa asawen igenaganawa nam padam karana one nabithiye gahagana print karala hehe

ewa ena tawa godaaaak kal yai heheagrmrs said:oyalage results out une nadda thama![]()
shan_n95 said:machn dan hithapanko apita cos 15 agaya hoyanna deelath natttan agaya deelath nattan ekapaaratama e,f wage ganan dunnoth hoyanne kohomadha