I dont know how to find the exact value of something(trig)...e.g.
sec(13Pi/6) I get a long decimal(1.31...) but how am I meant to get the exact value answer which in this case is 2/3 of the square root of 3. (which is 1.31 when u calculate it but when I see 1.31 how am I meant to know that its 2/3 the square root of 3?
question 2:
3(tan^2 )theta - sec theta = 1
for 0 <= theta =< 2PI
can anyone solve that for me? thanks
oh and for the following graph sketches:
y = sin3x
y = |sin3x|
y = sin|3x|
so like I was confused to whether they amplitude was 3 times bigger or the frequency is like 3 times smaller for them. can someone tell me what the difference of those curves are from a normal sinx
Draw the graph of by reflecting around the x-axis the parts of the graph of that lie below the x-axis. So there are salient points at where n is an integer.
Draw the graph of by reflecting around the x-axis the part of the graph of that lies to the left of the y-axis. So there's a salient point at (0, 0).
Note: for and for .
Salient point: Salient Point -- from Wolfram MathWorld