(sinθ＋cosθ)^2=sin^2θ＋cos^2θ＋2sinθcosθ=1＋2sinθcosθ=(1/5)^2
sinθcosθ=−12/25
こうなる！
分からないとこがあったら教えて下さい
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(sinθ＋cosθ)^2=sin^2θ＋cos^2θ＋2sinθcosθ=1＋2sinθcosθ=(1/5)^2
sinθcosθ=−12/25
こうなる！
分からないとこがあったら教えて下さい
Users viewing this question
are also looking at these questions 😉
