Unit 4

Question 1

sin of 30, 60, 45

Answer 1

1/2
Square root 3/2,
square root 2/2

Question 2

cos of 30, 60 45

Answer 2

square root 3/2
1/2
square root 2/2

Question 3

tan 30, 60, 45

Answer 3

square root 3/3
square root 3
1

Question 4

standard form on angle

Answer 4

and angle whos vertex is on the orgin and initial side lies on the positive x-axis

Question 5

co-terminal angles

Answer 5

angles that have the same initial and terminal sides, nut different amounts or direction of rotation

Question 6

quadrantal angle

Answer 6

angle in standard position whose terminal side lies on the axis

Question 7

radian

Answer 7

a central angle whose arc length is equal to the length or the radius

Question 8

how many radians in a cricle?

Answer 8

2π

Question 9

how many radians in a half circle?

Answer 9

π

Question 10

central angle

Answer 10

angle formed by two radii whose vertex is at the center if a circle

Question 11

arc

Answer 11

piece of circle’s circumference formed by the central angle

Question 12

radians at angles 0, 90, 180, 270, 360

Answer 12

0, π/2, π, 3π/2, 2π

Question 13

how to solve for radian measure with arc lenght and radius?

Answer 13

theta=arclength/radius

Question 14

how to solve for area of a sector

Answer 14

A=r^2 times theta/2

Question 14

area of a circe

Answer 14

(pi)r^2