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TMIDL #2: Use sin-1 when you want to find the angle

A series of posters on teaching methods I don't like, including details of the original method, my pedagogical complaints, and my preferred method.

Ucitelka

2nd Mar 2018 Flag Comment

Fully agree. The angle is a "heart" of sin, cos or tan function, it can't live without it (I tell my less perceptive students). And use "undoing" sine, cosine or tangent, like "lifting a spell and seeing the angle".

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