Question 18: If \( \tan \theta = \frac ab\), show that \( \frac{a \sin \theta - b \cos \theta}{a \sin \theta + b\cos \theta} = \frac{a^2-b^2}{a^2+b^2} \).

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TopNewestJust divide the numerator and denominator of the LHS by \( \tan\theta\) – Aditya Chauhan · 2 years, 1 month ago

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– Swapnil Das · 2 years, 1 month ago

Thank you for helping!Log in to reply

– Aditya Chauhan · 2 years, 1 month ago

No problemLog in to reply

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– Swapnil Das · 2 years, 1 month ago

RD Sharma- 11Log in to reply

Use componendo dividendo – Aditya Kumar · 2 years, 1 month ago

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Whoever edited it, Thanks! – Swapnil Das · 2 years, 1 month ago

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