What does sec mean? We have been asked to do chapter 4 of C3 and I dunno what it means... is it sin-1 or something?
& whats the button for it on a sci-cal.
Full Version: Maths terminology (trig)
Ahhh - so doing C3 now are we? 
Sec theta is simply 1 / cos theta
sec = 1/cos
cot = 1/tan
cosec = 1/sin
Sec theta is simply 1 / cos theta
sec = 1/cos
cot = 1/tan
cosec = 1/sin
ok cheers 
, yeah we did chapter 1 last term, and have been asked to do chapter 4 over the summer hols, 2 days until I go back so I thought I would make a start
, yeah we did chapter 1 last term, and have been asked to do chapter 4 over the summer hols, 2 days until I go back so I thought I would make a start
QUOTE(Starnox @ Sep 3 2005, 12:20 PM) 
What does sec mean? We have been asked to do chapter 4 of C3 and I dunno what it means... is it sin-1 or something?
& whats the button for it on a sci-cal.
& whats the button for it on a sci-cal.
There usually isn't a button for it on a calculator, you just use sin(x)^(-1) for cosec(x) (or csc(x)) and cos(x)^(-1) for sec(x).
Mind though that with "sin(x)^(-1)", I really mean raised to the power -1, so the multiplicative inverser. The notation is also sometimes used to denote the inverse sine (and cosine), but then it shouldn't be seen as a real exponent.
QUOTE(Tom! @ Sep 3 2005, 01:39 PM)
There usually isn't a button for it on a calculator, you just use sin(x)^(-1) for cosec(x) (or csc(x)) and cos(x)^(-1) for sec(x).
Mind though that with "sin(x)^(-1)", I really mean raised to the power -1, so the multiplicative inverser. The notation is also sometimes used to denote the inverse sine (and cosine), but then it shouldn't be seen as a real exponent.
Mind though that with "sin(x)^(-1)", I really mean raised to the power -1, so the multiplicative inverser. The notation is also sometimes used to denote the inverse sine (and cosine), but then it shouldn't be seen as a real exponent.
yeah, cheers
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