Trig Unit Circle

Question 1

What is the sin and cos of 0 degrees?

Answer 1

sin(0)=0 cos(0)=1

Question 2

What is the sin and cos of π/6?

Answer 2

sin(30)=1/2 cos(30)=√3/2

Question 3

What is the sin and cos of π/4?

Answer 3

sin(45)=√2/2 cos(45)=√2/2

Question 4

What is the sin and cos of π/3?

Answer 4

sin(60)=√3/2 cos(60)=1/2

Question 5

What is the sin and cos of π/2?

Answer 5

sin(90)=1 cos(90)=0

Question 6

What is the sin and cos of 2π/3 (ref=60)?

Answer 6

sin(120)=√3/2 cos(120)= -1/2

Question 7

What is the sin and cos of 3π/4 (ref=45)?

Answer 7

sin(135)=√2/2 cos(135)= -√2/2

Question 8

What is the sin and cos of 5π/6 (ref=30)?

Answer 8

sin(150)=1/2 cos(150)= -√3/2

Question 9

What is the sin and cos of π?

Answer 9

sin(180)=0 cos(180)=-1

Question 10

What is the sin and cos of 7π/6 (ref=30)?

Answer 10

sin(210)= -1/2 cos(210)= -√3/2

Question 11

What is the sin and cos of 5π/4 (ref=45)?

Answer 11

sin(225)=-√2/2 cos(225)=-√2/2

Question 12

What is the sin and cos of 4π/3 (ref=60)?

Answer 12

sin(240)=-√3/2 cos(240)= -1/2

Question 13

What is the sin and cos of 3π/2?

Answer 13

sin(270)=-1 cos(270)=0

Question 14

What is the sin and cos of 5π/3 (ref=60)?

Answer 14

sin(300)=-√3/2 cos(300)= 1/2

Question 15

What is the sin and cos of 7π/4 (ref=45)?

Answer 15

sin(315)=-√2/2 cos(315)=√2/2

Question 16

What is the sin and cos of 11π/6 (ref=30)?

Answer 16

sin(330)= -1/2 cos(330)= √3/2