Trigonometry

Question 1

SOH

Answer 1

Sine = opposite / hypotenuse

Question 2

CAH

Answer 2

Cosine = adjacent / hypotenuse

Question 3

TOA

Answer 3

Tangent = opposite / adjacent

Question 4

bearings must always use

Answer 4

three digits - 045, 278, 002

Question 5

Bearings are measured

Answer 5

clockwise from north

Question 6

Bearings - “from” is

Answer 6

where you put the protractor

Question 7

Angle of elevation

Answer 7

The angle between the line of sight and horizontal, going up

Question 8

Angle of depression

Answer 8

The angle between the line of sight and horizontal, going down

Question 9

0 to 90

Answer 9

All

Question 10

90 to 180

Answer 10

Sine

Question 11

180 to 270

Answer 11

Tangent

Question 12

270 to 360

Answer 12

Cosine

Question 13

I

Answer 13

a

Question 14

II

Answer 14

180 - a

Question 15

III

Answer 15

180 + a

Question 16

IV

Answer 16

360 - a

Question 17

Sine rule side

Answer 17

a b c
———— = ———— = ————
sin ( A ) sin ( B ) sin ( C )

Question 18

Sine rule angle

Answer 18

sin ( A ) sin ( B ) sin ( C )
———— = ———— = ————
a b c

Question 19

Cosine rule A

Answer 19

a^2 = b^2 + c^2 - 2 x b x c x cos ( A )

Question 20

Cosine rule B

Answer 20

cos ( A ) = b^2 + c^2 - a^2
———————–
2 x b x c

Question 21

Area rule

Answer 21

A = 1/2 a x b x sin ( c )

Question 22

Sine rule side uses…

Answer 22

2 angles and 1 excluded side

Question 23

Sine rule angle uses…

Answer 23

2 sides and 1 excluded angle

Question 24

Cosine rule A uses…

Answer 24

2 sides and 1 included angle

Question 25

Cosine rule B uses…

Answer 25

3 sides

Question 26

Area rule uses…

Answer 26

2 sides 1 included angle