Proving the Trig Identity CBSE 2026
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Namaskar dosto! Aaj ham ek bahut important trigonometry question solve karenge. Yeh question board
par clearly likha hai. Isko hum prove karenge aaj. Toh pehle hum
numerator aur denominator ko cos A minus sin A plus 1 se multiply karenge.
Ab numerator ban gaya whole square aur denominator me hamara conjugate factor aa gaya.
Ab numerator ko expand karte hain: cos square plus sin square plus 1 minus the
terms. Yaha pe humein pata hai ki cos square plus sin square 1
hota hai. Replace karte hain. Ab ham denominator ko expand karte hain.
Isko multiply karne par milta hai 2 sin A minus 2 sin square A.
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