Difference between revisions of "Pythagorean identity for sin and cos"
From specialfunctionswiki
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<strong>[[Pythagorean identity for sin and cos|Theorem]]: (Pythagorean identity)</strong> The following formula holds for all $x$: | <strong>[[Pythagorean identity for sin and cos|Theorem]]: (Pythagorean identity)</strong> The following formula holds for all $x$: | ||
$$\sin^2(x)+\cos^2(x)=1,$$ | $$\sin^2(x)+\cos^2(x)=1,$$ | ||
| − | where $\sin$ denotes the [[sine | + | where $\sin$ denotes the [[sine]] function and $\cos$ denotes the [[cosine]] function. |
<div class="mw-collapsible-content"> | <div class="mw-collapsible-content"> | ||
<strong>Proof:</strong> █ | <strong>Proof:</strong> █ | ||
</div> | </div> | ||
</div> | </div> | ||
