✨ Best Answer ✨
sin²(90+θ)
=sin(90+θ)×sin(90+θ)
=cosθ×cosθ=cos²θ
単位円(半円)の図を書いてみるとわかりやすいですよ。
同じ角度の所にマークつけたりしてみてください
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✨ Best Answer ✨
sin²(90+θ)
=sin(90+θ)×sin(90+θ)
=cosθ×cosθ=cos²θ
単位円(半円)の図を書いてみるとわかりやすいですよ。
同じ角度の所にマークつけたりしてみてください
Users viewing this question
are also looking at these questions 😉
