Trig

Question 1

2π

Answer 1

360°

Question 2

π

Answer 2

180°

Question 3

π/2

Answer 3

90°

Question 4

π/3

Answer 4

60°

Question 5

π/4

Answer 5

45°

Question 6

π/6

Answer 6

30°

Question 7

sin30

Answer 7

1/2

Question 8

sin60

Answer 8

sqrt3 /2

Question 9

sin45

Answer 9

sqrt2/2

Question 10

cos30

Answer 10

sqrt3 /2

Question 11

cos60

Answer 11

1/2

Question 12

cos45

Answer 12

sqrt2/2

Question 13

tan30

Answer 13

sqrt3/3

Question 14

tan60

Answer 14

sqrt3

Question 15

tan45

Answer 15

1

Question 16

Sinθ=

Answer 16

(180-θ)+360

Question 17

cosθ

Answer 17

(360-θ)+360

Question 18

tanθ

Answer 18

180

Question 19

cosecθ

Answer 19

1/sinθ

Question 20

secθ

Answer 20

1/cosθ

Question 21

cotθ

Answer 21

1/tanθ or cosθ/sinθ

Question 22

sin cofunction

Answer 22

cos(90-θ)

Question 23

cos cofunction

Answer 23

sin(90-θ)

Question 24

sin^2θ identity

Answer 24

sin^2 + cos^2 = 1

Question 25

sec^2 identity

Answer 25

1 + tan^2 = sec^2

Question 26

cosec^2 identity

Answer 26

1 + cot^2 = cos^2

Question 27

sin2θ

Answer 27

2sinθcosθ

Question 28

cos2θ

Answer 28

cos^2θ-sin^2θ

2cos^2θ -1

1-2sin^2θ

Question 29

tanθ

Answer 29

2tanθ/1-tan^2θ

Question 30

sin^2θ rearranged double angle formula

Answer 30

1/2 - 1/2cos2θ

Question 31

cos^2θ

Answer 31

1/2 + 1/2cos2θ

Question 32

If Rcosθ=a and Rsinθ=b, what is R and what is θ

Answer 32

R = sqrt(a^2 + b^2)

tanθ=b/a (s/c)