Trig identities and examples | Trigonometry | Khan Academy (English)

   Tuesday, June 29, 2021   

Starting a new Lecture Notes Series on Trig identities and examples | Trigonometry | Khan Academy

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Trig identities and examples | Trigonometry | Khan Academy
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Lecture Description of this above Topic:

Lecture 1: Proof of angle addition formula for cosine

Lecture 2: Sine of non special angle

Lecture 3: Examples using pythagorean identities to simplify trigonometric

Lecture 4: Law of cosines for star distance

Lecture 5: Proof: Law of sines

Lecture 6: Periodicity of tan example

Lecture 7: Double angle formula for cosine example

Lecture 8: Trig challenge problem: area of a hexagon

Lecture 9: Law of cosines to determine grade

Lecture 10: IIT JEE trigonometric constraints

Lecture 11: Pythagorean trig identity from soh cah toa

Lecture 12: Law of sines for missing angle

Lecture 13: Trig identities part 3 (part 5 if you watch the proofs)

Lecture 14: Proof of angle addition formula for sine

Lecture 15: Law of sines | Trig identities and examples

Lecture 16: IIT JEE trigonometry problem 1

Lecture 17: Another example using angle addition formula with cosine

Lecture 18: Trigonometric system example

Lecture 19: Law of cosines

Lecture 20: Trig identities part 2 (part 4 if you watch the proofs)

Lecture 21: Trigonometry identity review/fun

Lecture 22: Relating trig function through angle rotations

Lecture 23: Cosine addition identity example

Lecture 24: Unit circle symmetries for tan

Lecture 25: Pythagorean trig identity from unit circle

Lecture 26: Proof of the law of cosines

Lecture 27: Applying angle addition formula for sin

Lecture 28: Trig challenge problem: area of a triangle

Lecture 29: Using the Pythagorean trig identity

Lecture 30: Symmetry of trig values

Lecture 31: IIT JEE trigonometric maximum

Lecture 32: Angle addition formula with cosine