sin,cos,tg,ctg,sec,csc30'60'90'180'的值是多少?

sin,cos,tg,ctg,sec,csc30'60'90'180'的值是多少?
sin,cos,tg,ctg,sec,csc30'60'90'180'的值是多少?

sin,cos,tg,ctg,sec,csc30'60'90'180'的值是多少?
sin30'=1/2
sin60'=（根号3）/2
sin90'=1
sin180'=0
cos30'=sin60'
cos60'=sin30'
cos90'=0
cos180'=-1
tg30'=（根号3）/3
tg60'=3
tg90'无意义
tg180'=0
ctg30'=根号3
ctg60'=1/3
ctg90'=0
ctg180'无意义
sec
sec
sec
csc
csccsc

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