Question

geometricaly prove thst sin^2A + cos^2A =1​

Answer 1

${\huge{\red{\underline{To Prove:}}}}$

sin²A + cos²A = 1

${\huge{\green{\underline{Proof:}}}}$

sinA = AB/AC ; cosA = BC/AC

sin²A + cos²A

= AB²/AC² + BC²/AC²

= (AB²+BC²)/AC²

= AC²/AC² = 1

${\orange{★}}$ Hence proved${\green{★}}$

Answer 2

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