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यदि `tan theta=4/3,` तो `theta` के अन्य त्रिकोणमितीय अनुपात ज्ञात कीजिए.

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दिया है `tan theta=4/3=(BC)/(AB)`
पाइथागोरस प्रमेय से, `AC^(2)=AB^(2)+BC^(2)=2^(2) +4^(2)=25`
अतः अन्य त्रिकोणमितीय अनुपातों को निम्न प्रकार परिभषित किया जा सकता है-
`sin theta=(BC)/(AC)=4/5,cos theta=(AB)/(AC)=3/5`
इसी प्रकार `cot theta=(AB)/(BC)=3/4,sec theta=(AC)/(AB)=5/3`
तथा `cosec theta=(AC)/(BC)=5/4`
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