mrdk, 
For beginners it is often not easy to distinguish between sine end cosine. (Tangent is obviously something different.)
But one can easily remember which is which by looking at the values they take at 90°, or π/2:
c0s (π/2) = 0,
s1n (π/2) = 1.
mrdk, For beginners it is often not easy to distinguish between sine end cosine. (Tangent is obviously something different.)
But one can easily remember which is which by looking at the values they take at 90°, or π/2:
c0s (π/2) = 0,
s1n (π/2) = 1.
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