sin ^2 67°+sin^2 23°
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sin^2 67° + cos^2 67°=1
sin^2 67° + cos^2 67°=1
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hum sin^2 23 ya sin^67ko cos me change kr dete hi to wo sin^2 @+cos^2 @k jaise ho jata jiska value 1 hota so answer is1.
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