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एक `DeltaABC` में `angleB=90^(@), ` यदि `AB=4` तथा `BC=3,` तब `angleA` के सभी त्रिकोणमितीय

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एक `DeltaABC` में `angleB=90^(@), ` यदि `AB=4` तथा `BC=3,` तब `angleA` के सभी त्रिकोणमितीय ज्ञात कीजिए.
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दिया है- `AB=4` व `BC=3`
तब पाइथागोरस प्रमेय से,
`AC^(2)=AB^(2)+BC^(2)=(4)^(2)+(3)^(2)=16+9=25`
`AC=sqrt25=5,`
`thereforesin A=(" लम्ब")/(" कर्ण")=3/5`
`cos A=("आधार")/(" कर्ण")=4/5,tan A=(" लम्ब")/(" आधार ")=3/4`
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