How do I do that?
cosec 210
I can do the standard ones straight through my calculator but I'm pulling a blank with the cosec and the other advanced (?) ratios.
2007-11-05 22:29:14 · 6 answers · asked by Skaggy says: 5 in Science & Mathematics ➔ Mathematics
cosec(x) = 1/sin(x)
If you can use your calculator:
cosec(210°) = 1/sin(210°)
= 1/(-0.5)
= -2
If you cannot use your calculator:
cosec(210°)
= 1/sin(210°)
= 1/sin(180°+30°)
= 1/(-sin(30°))
= 1/(-1/2)
= -2
2007-11-05 22:41:25 · answer #1 · answered by gudspeling 7 · 3⤊ 0⤋
cosec 210 = cosec (180 + 30)
=> -cosec 30
=> -2
2007-11-05 22:34:00 · answer #2 · answered by rishi 2 · 1⤊ 0⤋
always remember;
tan x = sinx/cosx;
cot x = cosx/sinx
secx = 1/cosx
Cosec x = 1/sinx
so; cosec 210 = 1/ sin210
cosec 210 = 1/ -0.156434465
cosec 210 = - 6.392453221
2007-11-05 22:58:03 · answer #3 · answered by Anonymous · 0⤊ 0⤋
cosec =1/sin and 210 = 180 +30 so cosec210 =-1/sin30 =-2
2007-11-05 22:35:13 · answer #4 · answered by santmann2002 7 · 1⤊ 0⤋
the answer is -2. just find sin210 first
cosec210 = 1/sin210.
2007-11-05 22:36:40 · answer #5 · answered by alias 2 · 1⤊ 0⤋
idk
2007-11-05 22:30:51 · answer #6 · answered by Anonymous 1 · 0⤊ 3⤋