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Formulas for Trigonometric Functions: Sum/Difference, Double/Half-Angle, Prod-to-Sum/Sum-to-Prod

49,516 views

Professor Dave Explains

Video Language:

  • English

Caption Language:

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

Accent:

  • English (US)

Speech Time:

89%
  • 8:26 / 9:28

Speech Rate:

  • 147 wpm - Conversational

Category:

  • Education

Tags :

Intro:

Video Vocabulary

tutorial

/t(y)o͞oˈtôrēəl/

adjective noun

relating to tutor or tutor's tuition. A lesson given to a small group.

derivations

/ˌderəˈvāSH(ə)n/

noun other

action of deriving something from source. Sources; origins; where some things developed from.

valuable

/ˈvaly(o͞o)əb(ə)l/

adjective noun

Being useful or important. thing that is of great worth,.

instead

/inˈsted/

adverb

When one thing is replaced by another.

functions

/ˈfəNG(k)SH(ə)n/

noun other verb

activity natural to or purpose of person or thing. Social events or parties, such as weddings. To be operating, working or achieving its purpose.

combine
noun verb

group acting together commercially. To mix several things together to form one thing.

probably

/ˈpräbəblē/

adverb

certainly.

precise

/prəˈsīs/

adjective

(Of language details etc.) Very accurate and exact.

difference

/ˈdif(ə)rəns/

noun verb

Not of the same kind; unlike other things. alter coat of arms.

formulas

/ˈfôrmyələ/

noun other

mathematical relationship in symbols. Plans, rules or methods for doing or making some things.

quarter

/ˈkwôrdər/

noun verb

each of four equal or corresponding parts into which something is or can be divided. To split something into four equal parts.

twelfths

/twelfTH/

number other

constituting number twelve in sequence. 1/12s.

multiplying

/ˈməltəˌplī/

verb

To increase in number by reproducing/having babies.

important

/imˈpôrtnt/

adjective

of great significance or value.

memorized

/ˈmeməˌrīz/

verb

To study something so that you remember it.

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