3. Trigonometry 1

0.0(0)
studied byStudied by 0 people
learnLearn
examPractice Test
spaced repetitionSpaced Repetition
heart puzzleMatch
flashcardsFlashcards
Card Sorting

1/10

encourage image

There's no tags or description

Looks like no tags are added yet.

Study Analytics
Name
Mastery
Learn
Test
Matching
Spaced

No study sessions yet.

11 Terms

1
New cards

sin²x + cos²x =

1

2
New cards

acute angle

less than 90

3
New cards

obtuse angle

between 90 and 180

4
New cards

reflex angle

between 180 to 360

5
New cards

explain what sin, cos and tan are in the unit circle

tan = gradient

sin = y

cos = x

6
New cards

cos(-x) =

cos x

7
New cards

sin(-x) =

-sinx

8
New cards

the ambiguos case of the sine rule

when two triangles can be drawn with the sine angle found one with an acute angle or obtuse angle

9
New cards

sine rule

a/sinA = b/sinB

10
New cards

cosine rule

a² = b² + c² - 2bccosA

11
New cards

area of a triangle

½ a b sinC