By Levels

Library

EXP: 08888
HITS: {{lyricTraining.hits}}888
STREAKS: {{lyricTraining.streaks}}888
TIME: {{lyricTraining.timeout / 1000}}88
{{word.word}}

{{cue.translated_text}}

{{lyricTraining.hint}}

x{{playblackSpeed.toFixed(2)}}

Loading ..

Not Found

{{annotation.word}} ({{annotation.pos_simplify}})

/{{annotation.phonetic}}/

{{annotation.translation}}

{{annotation.name}}

{{annotation.sub_type}}

{{annotation.definition}}
Back

Games & Quizzes

Training Mode - Typing
Fill the gaps to the Lyric - Best method
Training Mode - Picking
Pick the correct word to fill in the gap
{{game.name}}
{{game.description}} Requires {{game.required_annotions}} vocabulary annotations

Congratulations! You gained {{totalPoint}} XP

You may need to watch a part of the video to unlock quizzes

Don't forget to Sign In to save your points

Repeat Skip ({{game.question_index}}/{{game.questions.length}})
{{part}}
Repeat Skip ({{game.question_index + 1}}/{{game.questions.length}})
{{choice.text}}
{{choice.text}}

Make correct pairs from two columns

{{lyricTraining.finished && lyricTraining.timed_out ? 'Timed Out' : 'Challenge Accomplished'}}

PERFECT HITS {{lyricTraining.stats.PERFECT_HITS}} +{{lyricTraining.stats.PERFECT_HITS * 20}}
HITS {{lyricTraining.stats.HITS}} +{{lyricTraining.stats.HITS * 10}}
LONGEST STREAK {{lyricTraining.stats.LONGEST_STREAKS}} +{{lyricTraining.stats.LONGEST_STREAKS * 10}}
REMAINING TIME {{lyricTraining.timeout / 1000}}s +{{lyricTraining.timeout / 1000}}
TOTAL +{{lyricTraining.exp}}
{{word.word}} - {{dictionary.definition[0].phonetic || ("/" + dictionary.phonetics +"/")}} - {{word.translation}}

We couldn't find definitions for the word you were looking for.
Or maybe the current language is not supported

{{simpleDefinition.pos}}

{{simpleDefinition.def}}

{{word.word}}

Sentences & parts of speech:

  • {{tag.normal}} {{tag.pos_name}}

  • {{c.startTime | duration}}


    {{c.translated_text}}

All {{pos.pos_simplify}}
{{a.word || a.name}}
/{{a.phonetic}}/
{{a.type || a.sub_type}}
{{a.translation}} 		{{a.definition}}

Trigonometry Proofs Involving Half and Double Angles

78,192 views

ProfRobBob

Video Language:

  • English

Caption Language:

  • {{captionLanguage | language_name}} ({{captionLanguage}})

Accent:

  • English (US)

Speech Time:

99%
  • 17:28 / 17:35

Speech Rate:

  • 145 wpm - Conversational

Category:

  • Education

Tags :

Intro:

Video Vocabulary

algebra

/ˈaljəbrə/

noun

part of mathematics in which letters and other general symbols are used to represent numbers and quantities.

written

/rīt/

adjective other verb

Expressed using writing. To invent or create a computer program. To compose letters and words on paper of a screen.

squared

/skwerd/

adjective verb

(Of number) multiplied by itself (e.g. 2 x 2). To straighten the edge to form a four-sided shape.

identities

/ˌīˈden(t)ədē/

noun other

fact of being particular person or thing. Collections of qualities that makes a person.

dealing

/ˈdēliNG/

noun verb

business relations or transactions. To do business with someone or to sell products.

working

/ˈwərkiNG/

adjective noun verb

having paid employment. action of doing work. To make an effort to do something.

examples

/iɡˈzampəl/

noun other verb

thing characteristic of its kind. Things, people, which represent a category. be illustrated or exemplified.

welcome - welcome

/ˈwelkəm/

adjective exclamation noun verb

gladly received. used to greet someone in polite or friendly way. instance or manner of greeting someone. greet someone arriving in polite or friendly way.

something

/ˈsəmˌTHiNG/

adverb pronoun

used for emphasis with following adjective functioning as adverb. Thing that is not yet known or named.

formula

/ˈfôrmyələ/

noun

mathematical relationship in symbols.

happens

/ˈhapən/

verb

To take place or occur.

cotangent

/kōˈtanjənt/

noun other

(in right-angled triangle) ratio of side other than hypotenuse adjacent to particular acute angle. Ratio of the adjacent to the opposite side of a right-angled triangle.

hopefully

/ˈhōpfəlē/

adverb

In a manner wishing something to happen.

denominators

/dəˈnäməˌnādər/

noun other

number below line in vulgar fraction. Bottom number in a fraction.

Q
W
E
R
T
Y
U
I
O
P
A
S
D
F
G
H
J
K
L
Z
X
C
V
B
N
M