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		<title>Wie beweisen Sie #cosX / (secX &#8211; tanX) = 1 + sinX #?</title>
		<link>https://dieklugeeule.com/wie-beweisen-sie-cosx-secx-tanx-1-sinx/</link>
		
		<dc:creator><![CDATA[Denni]]></dc:creator>
		<pubDate>Sun, 15 Mar 2020 17:43:27 +0000</pubDate>
				<category><![CDATA[Trigonometrie]]></category>
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					<description><![CDATA[Wie beweisen Sie #cosX / (secX - tanX) = 1 + sinX #? Antworten: Wie nachstehend. Erläuterung: Beweisen #cos x / (sec x - tan x) = (1 + sin x)# LHS # = cos x / ((1/cos x) - (sin x / cos x)# as #color(blue)(sec x = 1/cos x, tan x = sin ... <a title="Wie beweisen Sie #cosX / (secX &#8211; tanX) = 1 + sinX #?" class="read-more" href="https://dieklugeeule.com/wie-beweisen-sie-cosx-secx-tanx-1-sinx/" aria-label="Mehr dazu unter Wie beweisen Sie #cosX / (secX &#8211; tanX) = 1 + sinX #?">Weiterlesen</a>]]></description>
										<content:encoded><![CDATA[<h1 class="questionTitle">Wie beweisen Sie #cosX / (secX - tanX) = 1 + sinX #?</h1>
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<h4 class="answerHeader">Antworten:</h4>
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<p>Wie nachstehend.</p>
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<h4 class="answerHeader">Erläuterung:</h4>
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<p>Beweisen #cos x / (sec x - tan x) = (1 + sin x)#</p>
<p><img alt="Bildquelle hier eingeben" src="https://d2jmvrsizmvf4x.cloudfront.net/8GDSjcLIT5O29hLIZ0ho_D87C62E8-0AE3-41DF-964E-0055883894AB.jpeg" /> </p>
<p>LHS # = cos x / ((1/cos x) - (sin x / cos x)#  as  #color(blue)(sec x = 1/cos x, tan x = sin x / cos x#</p>
<p>#=&gt; cos x / ((1 - sin x) / cos x)#  as  #color(green)(cos x # ist das LCM des Nenners.</p>
<p>#=&gt; cos^2 x / (1 - sin x)#</p>
<p>#=&gt; = (1 - sin^2 x) / (1 - sin x)#  as  #color(blue)(cos^2x = 1 - sin^2x#</p>
<p>#=&gt; ((1+ sin x) *color(red)(cancel (1 - sin x))) /color(red)(cancel (1 - sin x))#</p>
<p>#=&gt; 1 + sin x#</p>
<p>QED</p>
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