Trig

Question 1

Cosine Law

Answer 1

a^2=b^2+c^2-2bcCosA

Question 2

Sine Law

Answer 2

SinA/a = SinB/b = SinC/c = …

Question 3

Sin0

Answer 3

0

Question 4

Sin30

Answer 4

Root1 /2

Question 5

Sin45

Answer 5

Root2 /2

Question 6

Sin60

Answer 6

Root3 /2

Question 7

Sin90

Answer 7

Root4 /2 aka 1

Question 8

Cos0

Answer 8

Root4 /2 aka 1

Question 9

Cos30

Answer 9

Root3 /2

Question 10

Cos45

Answer 10

Root2 /2

Question 11

Cos60

Answer 11

Root1 /2

Question 12

Cos90

Answer 12

0

Question 13

Tan0

Answer 13

0

Question 14

Tan30

Answer 14

1/root3

Question 15

Tan45

Answer 15

1

Question 16

Tan60

Answer 16

Root3

Question 17

Tan90

Answer 17

Undefined

Question 18

Reciprocal identity (sin)

Answer 18

Sinx = 1/cscx

Question 19

Reciprocal Identity (cos)

Answer 19

Cosx = 1/secx

Question 20

Reciprocal identity (tan)

Answer 20

Tanx = 1/cotx

Question 21

Reciprocal identity (csc)

Answer 21

Cscx = 1/sinx

Question 22

Reciprocal identity (sec)

Answer 22

Secx = 1/cosx

Question 23

Reciprocal identity (cot)

Answer 23

Cotx = 1/tanx

Question 24

Quotient identity

Answer 24

Tanx = sinx/cosx

Cotx = cosx/sinx

Question 25

Pythagorean identity

Answer 25

sin^2x + cos^2x = 1

1 + cot^2x = csc^2x

Tan^2x + 1 = sec^2x

Question 26

Angle less than 90

Answer 26

Measure the sides

a >/= b, one solution

a < b, bSinA

Question 27

a = bSinA

Answer 27

One solution

Question 28

a < bSinA

Answer 28

No solutions

Question 29

a > bSinA

Answer 29

Two solutions

Question 30

Angle greater than/equal to 90

Answer 30

Measure the sides

a>b, one solution

a = b, no solutions