Question

Cara menghitung cosec , secan , cotangen . itu gimana ya? trus kalo bisa hitungnya pake sudut istimewa . 0 , 30, 45 ,60 ,90 .

Answer 1

Pertama kita harus hapal sin, cos, tan dari tiap-tiap sudut istimewa
cosec=1/sin
* cosec 0= 1/sin0= 1/0=~
*cosec 30 = 1/sin 30=1/(1/2)=2
*cosec 45= 1/ sin 45=1/(√2/2)=√2
*cosec60=1/sin60=1/(√3/2)= (2/3)√3
*cosec90=1/sin90=1/1=1
*sec0=1/cos0=1/1=1
*sec30=1/cos30=1/(√3/2)=(2/3)√3
*sec45=1/cos45=1/(√2/2)=√2
*sec60=1/cos60=1/(1/2)=2
ctg0=1/tag0=1/0=~
ctg30=1/tg30=1/(√3/3)=√3
ctg45=1/tg45=1/1=1
ctg60=1/tg60=√3/3
ctg90=1/tg90=1/~=~