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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 or origins from which some things derives.

valuable

/ˈvaly(o͞o)əb(ə)l/

adjective noun

Being worth a lot of money. thing that is of great worth,.

instead

/inˈsted/

adverb

as alternative or substitute.

functions

/ˈfəNG(k)SH(ə)n/

noun other verb

activity natural to or purpose of person or thing. What some things are intended to be used for; purpose. operate in particular way.

combine
noun verb

group acting together commercially. unite or merge.

probably

/ˈpräbəblē/

adverb

That is likely to happen or be true.

precise

/prəˈsīs/

adjective

Being very careful about how you do things.

difference

/ˈdif(ə)rəns/

noun verb

A thing or issue that people do not agree about. 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

One of four equal periods of play in some sports. divide into four equal or corresponding 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

Having power or authority.

memorized

/ˈmeməˌrīz/

verb

To study something so that you remember it.

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