trig

Question 1

two trig triangles

Answer 1

Question 2

proof of sin rule

Answer 2

Question 3

proof of cosine rule

Answer 3

Question 4

proof of area of a triangle

Answer 4

Question 5

unit circle

Answer 5

Question 6

radians

Answer 6

Question 7

arc length - radians

Answer 7

Question 8

area of sector - radians

Answer 8

Question 9

derive small angle approximations

Answer 9

????

Question 10

trig graphs + period

Answer 10

Question 11

inverse trig functions

Answer 11

 Arcsin / Arccos / Arctan

Question 12

how to draw inverse trig

Answer 12

Restrict domain to make function 1 to 1

Reflect sin / cos / tan graph in line y=x

Question 13

inverse trig equations

Answer 13

Question 14

Reciprocal of normal trig function

Answer 14

Cosec / sec / cot

Question 15

asymptote for reciprocal trig

Answer 15

 Must have asymptote when tan / cos / sin go through x axis because 1 divided by 0 is impossible

Question 16

Trig identities

Answer 16

Question 17

Proof of compound angle formula

Answer 17

Question 18

Double angle formula

Answer 18

Question 19

equivalent forms

Answer 19

Question 20

how to solve trig equations

Answer 20

If range is more than 360…

Find ALL answers between 0 and 360

Keep adding on NEW period of graph - NOTESSSS

Question 21

what to do if funny trig function

Answer 21

Solve normally – THEN apply translations

THEN – add on period until all solutions

Question 22

UNDERSTAND COS AND SIN AS TRANSLATIONS OF EACHOTHER

Answer 22

Question 23

HOW TO SOLVE TRIG IMPORTANT

Answer 23

solve normally - between 0 and 360

apply transformations

add period of NEW graph until all in range

Question 24

small angle approx - cos5x

Answer 24

take theta as 5x
so square that too