Mathematics
Senior High
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tan 195° の値を求めよ。

解き方教えて欲しいです💦

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✨ 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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