VCE Stuff > VCE Mathematical Methods CAS
how the eff do i teach myself trig in an hour
Galelleo:
sorry, im not explaining it very well :(
melanie.dee:
--- Quote from: "Galelleo" ---
Alternatively, you can think about it for a moment and picture the general graph, you know cos starts at 1, when x=0... and you know the period is 2pi, so you just picture where on the graph, pi, pi on 2, pi on 4, pi on 3, pi on 6, would be and you can memories/guess the values of cos /sin/tan at that point... although its probably easier to have a calculater ;)
--- End quote ---
ahahah thats what i have to resort to doing hahaha. its just sliiightly time consuming lol. i think my problem is memorising the exact values. should i try to understand how the triangles work or should a did lil bit o rote learning and memorise the values somehow. lol. god iv done NO eco study. im screwed for that now
Fitness:
--- Quote from: "melanie.dee" ---should i try to understand how the triangles work or should a did lil bit o rote learning and memorise the values somehow. lol. god iv done NO eco study. im screwed for that now
--- End quote ---
Learn the triangles. Once you memorise them, you go from memorising like nine things to just a couple. They are easy if you try hard enough to remeber them.
kingmar:
Try this one on for size. (I found it horrible, took me ages and timed my trial exam out)
Find exact solutions to the equation "1+sin(x) = 2(cos(x)squared) where x is in [0,2pi].
in words: one plus sine (x) equals two times (cos(x) squared).
Fitness:
--- Quote from: "kingmar" ---Try this one on for size. (I found it horrible, took me ages and timed my trial exam out)
Find exact solutions to the equation "1+sin(x) = 2(cos(x)squared) where x is in [0,2pi].
in words: one plus sine (x) equals two times (cos(x) squared).
--- End quote ---
What the hell? I just did it but am no way right .. lol
Answers?
Edit: Did it again and got x = pi/2, 3pi/2
Is this correct?
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