If you look at the graphs, you can see that they are different by a phase angle of pi/2. You can also use the equation for sin(A+B) …
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Tutoring Math at RLS, Friday Sheet in April
We started by looking at the cosine functions of sums and differences. Then used the Pythagorean Theorem on some triangles for some problems using the equations. Fractional exponents like 1/2 and …
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What does your calculator do when you press the sin/cos/tan button?
Apparently TI calculators use the CORIDC algorithm which involves rotation on a complex plane using complex numbers. COordinate Rotation DIgital Computer aka Voldic’s algorithm I would think that …
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SOHCAHTOA CHOSHACAO
We started by looking at evaluating trig functions of angles. They involved 30 60 90 triangles and 45 45 90. So we began by looking at those triangles. It's easy enough to derive the ratios for the …
“Why doesn’t my calculator shows sin 60 as root three by two when it is in radian mode?”
Saw this question today, If you take the trig function of two different values, the results could be equal, but there is no reason they have to be. In this case, the two results are not equal. …
Why is Tan(90°) Wrong? (Undefined)
I’ve drawn a triangle that has an angle close to 90°, it’s looks more like 85°. That is to make it look like a triangle rather than a degenerate triangle (straight line). But I have used the values of …