✨ Best Answer ✨
tan195゚=tan(240゚-45゚)
=(tan240゚-tan45゚)/(1+tan240゚・tan45゚)
=(√3-1)/(1+√3・1)
=(√3-1)/(√3+1)
=(√3-1)(√3-1)/(√3+1)(√3-1)
=(3-2√3+1)/(3-1)
=2-√3
こうだと思います
✨ Best Answer ✨
tan195゚=tan(240゚-45゚)
=(tan240゚-tan45゚)/(1+tan240゚・tan45゚)
=(√3-1)/(1+√3・1)
=(√3-1)/(√3+1)
=(√3-1)(√3-1)/(√3+1)(√3-1)
=(3-2√3+1)/(3-1)
=2-√3
こうだと思います
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