Math, asked by ajaypatel2377, 10 months ago

please please please please please please please please please please please please please please please please please please please please please please please solve it ​

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Answers

Answered by guptarajat698
2

Answer:

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full solution in pic

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Answered by biligiri
2

Answer:

given cot A = 4/5

to prove (sin A + cos A)/(sin A - cosA) = 9

as cot A = 4/5 = cos A/sin A = 4/5 (1)

let us divided through by sin A

LHS =>

(sin A/sin A+cos A/sin A)/sin A/sin A - cos A/sin A)

=> (1 + 4/5)/(1-4/5) [ substituting cosA/sinA = ,4/5 from equation 1 ]

=> (9/5)/(1/5)

=> 9/5 * 5/1

=> 9 = RHS hence proved

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