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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 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. 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

certainly.

precise

/prəˈsīs/

adjective

Being very careful about how you do things.

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

Area of a town or city defined by its inhabitants. To give a soldier a place to live for a short time.

twelfths

/twelfTH/

number other

constituting number twelve in sequence. 1/12s.

multiplying

/ˈməltəˌplī/

verb

To have increased by a large quantity.

important

/imˈpôrtnt/

adjective

of great significance or value.

memorized

/ˈmeməˌrīz/

verb

commit to memory.

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