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

sin(90-A)/cos(90-A)=होगा

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Sin 90 Degrees - Find Value of Sin 90 Degrees

sin(90^circ+2theta) is

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What is the value of sin 90? - Quora