三角関数計算の基礎:cosx偏

三角関数計算の基礎: $3$\displaystyle{\cos x}$ 編

[

$3$\displaystyle{\cos $ \frac{\hspace{2}{\pi}\hspace{2}}{\hspace{2}2\hspace{2}}+{\theta} $ =- \sin {\theta}}$

]

$3$\displaystyle{\cos $ \frac{\hspace{2}{\pi}\hspace{2}}{\hspace{2}2\hspace{2}}+{\theta} $ =- \sin {\theta}}$

$3$\displaystyle{ \{\begin{array}{lll}\cos {\theta}=x& \vspace{6}\\ \cos $ \frac{\hspace{2}{\pi}\hspace{2}}{\hspace{2}2\hspace{2}}+{\theta} $ =- y& \vspace{6}\\ \end{array} }$

よって，

$3$\displaystyle{\cos $ \frac{\hspace{2}{\pi}\hspace{2}}{\hspace{2}2\hspace{2}}+{\theta} $ =- \sin {\theta}}$

となる。

戻る

[さ]
[さ行]
[索引トップ]