plz solve this question
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that is the solution of that question
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a Sin Ф - b Cos Ф/ a Sin Ф + b Cos Ф = a² - b²/ a² + b²............i
Given
tan Ф = a/b
Divide the equation by Cos Ф
a tan Ф - b / a tan Ф + b = a * (a/b) - b/ a * (a/b) + b
(a² - b²)b / (a² + b²)/b = a² - b²/ a² + b² = R.H.S
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