Why does the trigonometric function change at 90 and 270 degrees? Like sin to cos, tan to cot : r/JEENEETards

Why does the trigonometric function change at 90 and 270 degrees

Can somebody give me an intuitive understanding of Sine, Cosine

Trig ratios (i.e. Sin, Cos, Tan): What exactly *are* they, and how

How can I calculate exponentials like this? : r/JEENEETards

Why do the trigonometric ratios change on θ=90 or θ=270 .eg sine

Why are sin and cos defined for 90 degrees and above if such

Isko kese learn Karo : r/CBSE

Explaining sine, cosine and tangent with the unit circle : r

Unit Circle Tangent Definition, Values & Examples - Lesson

Shouldn't A B C D be the correct options here? : r/JEENEETards

I know these do not equal 90 degrees used random numbers. My