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Why Sin²¤ + Cos²¤ = 1​

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BY PYTHAGORAS Theorem

H² = P² + B² ----- 1

Divide H² In EQUATION 1

= > \frac{ {h}^{2} }{ {h}^{2} } = \frac{ {p}^{2} }{ {h}^{2} } + \frac{ {b}^{2} }{ {h}^{2} } \\ \\ = > 1 = ( { \frac{p}{h} )}^{2} + {( \frac{b}{h} )}^{2} \\ \\

= > 1 = Sin²¤ + Cos²¤

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hope it helps u


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