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Trigonometric Identities

There are 4 videos in this category and 0 videos in 2 subcategories.

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Not Right For WatchKnowLearn
Ages: 14 - 18
1058 Views:
Proof: cos(a+b) = (cos a)(cos b)-(sin a)(sin b)
From YouTube, produced by Sal Khan of Khan Academy
Proof of the trig identity: cos(a+b) = (cos a)(cos b)-(sin a)(sin b). In an easy conversational tone, the instructor uses the computer screen as his 'blackboard' and different colors to emphasis his points. For high school students.
December 8, 2009 at 02:27 AM
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Not Right For WatchKnowLearn
Ages: 14 - 18
983 Views:
Trigonometric Identities
From YouTube, produced by Sal Khan of Khan Academies
This video is an introduction to trigonometric identities. In an easy conversational tone, the instructor uses the computer screen as his 'blackboard' and different colors to emphasis his points. For high school students.
December 8, 2009 at 02:23 AM
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Not Right For WatchKnowLearn
Ages: 14 - 18
947 Views:
Trig Identities, Part 2
From YouTube, produced by Sal Khan of Khan Academy
More 'playing around' with trig identities. In an easy conversational tone, the instructor uses the computer screen as his 'blackboard' and different colors to emphasis his points. For high school students.
December 8, 2009 at 02:29 AM
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Not Right For WatchKnowLearn
Ages: 14 - 18
911 Views:
Trig Identities; Part 3
From YouTube, produced by Sal Khan of Khan Academy
Continuation of the instructor 'playing around' (to use his words) with trig identities. In an easy conversational tone, the instructor uses the computer screen (Paint program) as his 'blackboard' and different colors to emphasis his points. For high... [more]
December 8, 2009 at 09:35 PM
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