Question

What is cos²x +sin² x = ? with proof​

Answer 1

1 from t-ratio it can be proved

Answer 2

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sin ×=p/h

cos=b/h

cos2×+sin2×= b2/h2+p2/h2

=p2+b2/h2

as we known as p2+b2 =h2

now, =h2/h2=1

proved ✔✔

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