What does sin(90°)=1 mean? - Quora
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Prove that : (i) `sinthetacos(90^(@)-theta)+sin(90^(@)-theta
How sin 90 is possible? - Quora
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sin 90° = 1 (Why & How?)
What is the value of cos(90)? - Quora
Sin 90 degrees = 1 😎 but why ???