Math, asked by jaber9816, 11 months ago

cosθ:sinθ=1:2 எ‌னி‌ல் (8cosθ-2cosθ)/(4cosθ+2sinθ) இ‌ன் ம‌தி‌ப்பை‌க் கா‌ண்க

Answers

Answered by mansurijishan805
0

Step-by-step explanation:

.....................................1:2

Answered by steffiaspinno
0

ம‌‌தி‌ப்பு $ =\frac{1}{2}

விள‌க்க‌ம்:

cosθ:sinθ=1:2

$ \frac{\cos \theta}{\sin \theta}=\frac{1}{2}

$ \cot \theta=\frac{1}{2}=\frac{\text { adj side }}{\text { opp side }}

A C=\sqrt{A B^{2}+B C^{2}}

      $ =\sqrt{4^{2}+1^{2}}

       $ =\sqrt{5}

$ \sin \theta=\frac{\text {opp side}}{\text {hypo}}= \frac{2}{\sqrt{5}}

$ \cos \theta=\frac{a d j \cdot s i d e}{h y p o}=\frac{1}{\sqrt{5}}

$ \frac{8 \cos \theta-2 \cos \theta}{4 \cos \theta+2 \sin \theta}

$ \Rightarrow \frac{8\left(\frac{1}{\sqrt{5}}\right)-2\left(\frac{2}{\sqrt{5}}\right)}{4\left(\frac{1}{\sqrt{5}}\right)+2\left(\frac{2}{\sqrt{5}}\right)}

$ \Rightarrow \frac{\left(\frac{8}{\sqrt{5}}\right)-\left(\frac{4}{\sqrt{5}}\right)}{\left(\frac{4}{\sqrt{5}}\right)+\left(\frac{4}{\sqrt{5}}\right)}

$ \Rightarrow \frac{\frac{8-4}{\sqrt{5}}}{\frac{4+4}{\sqrt{5}}}

$ \Rightarrow \frac{\frac{4}{\sqrt{5}}}{\frac{8}{\sqrt{5}}}

$ =\frac{4}{8}

$ =\frac{1}{2}

ம‌தி‌ப்பு $ \frac{8 \cos \theta-2 \cos \theta}{4 \cos \theta+2 \sin \theta}=\frac{1}{2}

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