• stebo
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      122 months ago

      so you don’t understand sin anymore? or division?

        • stebo
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          112 months ago

          You should sin more, 'cos you’ll go to hell and there you can get a tan

      • @[email protected]
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        102 months ago

        I haven’t had to do anything with sin, cos or tan in over 20 years and even back then it’s a miracle I managed to pass my advanced math course considering I never understood what they were because it was so badly explained to us…

            • @Feathercrown
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              2 months ago

              sin(x) and cos(x) return the side lengths of a triangle with hypotenuse 1 and angle x, like so:

              I also was never taught this, which sucks because it’s such a useful concept.

              You can verify that if the angle (x) was 0, cos(x) would be 1, and sin(x) would be 0. If the angle was 90 degrees (vertical), then cos(x) would be 0 and sin(x) would be 1. If the angle was 45 degrees, cos(x) and sin(x) would have the same value, because the triangle sides would have the same length.

              • @[email protected]
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                12 months ago

                But why?

                See, I was taught this, but no one could every answer why sine and cosine worked the way they did.

                This definition just explains how they work with triangles. What’s the actual definition of each, and how was that derived? I can apply them all day long yet I still can’t tell you what either one means.

                I had the same issues with different kinds of equations, no one ever explained why you’d do a certain thing in a given step (e.g. Quadratic) even when I asked, repeatedly. The answer was always “you just do”. Well that doesn’t help with knowing when to apply a rule.

                And that was my experience with any math, right through college (3 universities). Most teachers suck, but holy shit math teachers are down right moronic. They can’t understand why students don’t get it. Well, try actually teaching something for a fucking change.