# Videos & Textbook Links

1 Precalc Textbook-16z5prt

County Text book link page:

http://www.cobbk12.org/centraloffice/learningresources/hs.aspx#math

Part 2 Conics Quiz Q13-20

## Videos for Unit 8 Oblique Triangles

 Law of Sine https://www.khanacademy.org/math/geometry/hs-geo-trig/hs-geo-law-of-sines/v/law-of-sines Ambiguous Case – Law of Sine https://www.youtube.com/watch?v=o0y54YC9fDo Law of Cosine https://www.youtube.com/watch?v=hmn1qGrwmVI Area formulas involving Sine and Cosine https://www.youtube.com/watch?v=e5fRV2WX1hY Applications with the Law of Sine/Cosine https://www.youtube.com/watch?v=ObJuD9M5dQ8&t=1s

## Unit 6 Videos

 Basic Trig Identities-reciprocals, Pythagorean, quotient https://www.youtube.com/watch?v=ElwG5rhbelo More Trig Identities – factor with trig functions, odd/even, cofunctions https://www.youtube.com/watch?v=q_n6m3DJ-a0 Solving trig equations https://www.youtube.com/watch?v=sVWhFiGHpEA&t=546s More trig equations https://www.youtube.com/watch?v=2E-zElLBOh4&t=204s More identities – sum and difference More identities – half and double angle

## Videos for Unit 8 Oblique Triangles

 Law of Sine https://www.khanacademy.org/math/geometry/hs-geo-trig/hs-geo-law-of-sines/v/law-of-sines Ambiguous Case – Law of Sine https://www.youtube.com/watch?v=o0y54YC9fDo Law of Cosine https://www.youtube.com/watch?v=hmn1qGrwmVI Area formulas involving Sine and Cosine https://www.youtube.com/watch?v=e5fRV2WX1hY Applications with the Law of Sine/Cosine Video Link

Unit 5 Inverse Trig Videos

 Graphs of Inverse trig functions, sine, cosine and tangent https://www.youtube.com/watch?v=MXf3haMEb-U Evaluating inverse trig functions https://www.youtube.com/watch?v=YJpRTkm4ngU Composition of inverse trig functions https://www.youtube.com/watch?v=pWdGu9E5nCE

## Videos for Unit 4:  Graphing Trig Functions

 Graph Sine https://www.youtube.com/watch?v=XIlwtRRRPdg Graph Cosine https://www.youtube.com/watch?v=-BWVKw4ld68 Graph Tangent https://www.youtube.com/watch?v=Wq4q3y9_4Lc&list=PLurjkZV1ykGZLRmjm1w-BKaMrAVbeGt7T Graphing with Amplitude (a) https://www.youtube.com/watch?v=gy6p3znREAc Graphing with period (b) https://www.youtube.com/watch?v=klvOmbMQRXY Graphing with a phase shift and vertical shift (c and d) https://www.youtube.com/watch?v=GjUbg0U4hxI Putting all 4 transformations together https://www.youtube.com/watch?v=ftm3Z8Qn4VU Writing equations from graphs https://www.youtube.com/watch?v=MqzCD_zE0Aw Applications of Sinusoidal functions Ferris Wheel https://www.youtube.com/watch?v=iDEuLimcjtg

## Unit 1:  Matrices

Determinant of a 2×2 matrix:

Determinant of a 3×3 matrix using expansion by minors:

Determinant of a 3×3 using Diagonals or Lattice method:

Area of a triangle using Matrices

Area of a polygon using 2×2 matrices

Equation of a line using matrices

Equation of a parabola using matrices and a 3×3 system

## Unit 2:  Conics

Parabolas at the origin

Parabolas off the origin

Unit 3:  Unit circle

Convert Radians to degrees or Degrees to radians

Ordered Pairs at the 45’s

Angles in the unit circle:

Conics Quiz fall 2020 Q 13-21