What is sin(-90 degrees)?

Consider that -90° corresponds to 270° (the minus sign is to turn clockwise instead of counter-clockwise): so: sin(-90°)=sin(270°)=-1

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Lesson plan Class 10th Time 35min. Subject Mathematics - ppt video

How is Cos 90°=0, Cos 0°=1 and Sin 90°=1? - Quora

Answered: cos 29° cos 60° + sin 29° sin 60° .

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trigonometry - Why does sin(90)=1, and not 0? - Mathematics Stack Exchange

sin 90° = 1 (Why & How?)

Solved] Use the image below to answer the following question. What

What does sin(90°)=1 mean? - Quora

Answered: Graph the function f(x) = cot x+ Be…