Jawabanmu

2014-06-10T11:47:47+07:00
205mod25=5p
115mod25=15p
245mod25=20p
335mod25=10p
jd 5p-15p/20p-10p=p

2014-06-10T11:58:56+07:00
Jika diketahui tan 25 = p
tan 205- tan 115  =tan (180-25)-tan(90-25)
=-p-(-1/p)
=-p+1/p                             

tan 245+ tan 335=tan(279-25)+tan(360-25)
= 1/p-p 
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