Math, asked by Juharnik32, 1 year ago

रेखा x/a + y/b = 1 तथा x/2b -y/2a = 1 के बीच का कोण ज्ञात कीजिए

Answers

Answered by Swarnimkumar22
15
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रेखा x/a + y/b = 1 तथा x/2b -y/2a = 1 के बीच का कोण ज्ञात कीजिए

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\bold{Your\:answer\:is\:90°}

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हल-

रेखा  \frac{x}{a} + \frac{y}{b} = 1की प्रवणता

m1 = - \frac{ \frac{1}{a} }{ \frac{1}{b} } \\ \\ \\ \\ \\ m1 = - \frac{ b}{a}

तथा रेखा \frac{x}{2b} - \frac{y}{2a} = 1 की प्रवणता

m2 = - \frac{ \frac{1}{2b} }{ - \frac{1}{2a} } \\ \\ \\ \\ m2 = \frac{a}{b}

तब बीच का कोण  \theta = {tan}^{ - 1} \: \: \frac{m1 - m2}{1 + m1m2}

 = {tan}^{ - 1} \: \frac{ - \frac{ b}{a} - \frac{a}{b} }{1 + ( - \frac{b}{a} ) \times \frac{a}{b} } \\ \\ \\ \\ = {tan}^{ - 1} \frac{ - \frac{b}{a} - \frac{a}{b} }{1 - 1} \\ \\ \\ \\ = {tan}^{ - 1} \frac{ - ( \frac{b}{a} + \frac{a}{b} )}{0} \\ \\ \\ \\ {tan}^{ - 1 \: } \infty \\ \\ \\ = 90 {}^{0} \\ \\

अतः रेखाओं के बीच का कोण = 90°
Answered by rajeev378
7
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