Solve the equation $\cos\left(135\right)=4\cos\left(\right)$

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Solving: $\cos\left(135\right)=4\cos\left(\right)$

Solve instead: $\cos\left(135\right)=4\cos\left(45-3\cos\left(315\right)\right)$

 Solution

 Videos

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https://www.youtube.com/watch?v=M4ZbUoyVWvE

Pre-Calculus - Solving a trigonometric equation with our angle divided by 4, 2sin(x/4)+sqrt(3) =0

https://www.youtube.com/watch?v=CijimYb5MTM

Pre-Calculus - Solving trigonometric equations ex 8, cosx + sinx.tanx = 2

https://www.youtube.com/watch?v=LasCSb_b4OY

Tutorial - How to solve a equation using difference of two angles, cos(x + (pi)/6)-cos(x - (pi)/6)=1

https://www.youtube.com/watch?v=f-HJVxlmuKM

Algebra 2 - Learning to solve rational equations in math class ((x+3)/(x‐2)) + (5/(x^2‐4)) = 1

https://www.youtube.com/watch?v=y8p0Tpn3BcI

Algebra 2 - Learn to solve a rational equation by multiplying by the LCD (15/x)+((9x-7)/(x+2))=9

https://www.youtube.com/watch?v=BMSmvkWcVTU

Solve the equation $\cos\left(135\right)=4\cos\left(\right)$

Related Videos

 Solution

 Videos

Pre-Calculus - Determining the triple angle of cosine to solve the equation cos(3x)=-1/2

Pre-Calculus - Solving a trigonometric equation with our angle divided by 4, 2sin(x/4)+sqrt(3) =0

Pre-Calculus - Solving trigonometric equations ex 8, cosx + sinx.tanx = 2

Tutorial - How to solve a equation using difference of two angles, cos(x + (pi)/6)-cos(x - (pi)/6)=1

Algebra 2 - Learning to solve rational equations in math class ((x+3)/(x‐2)) + (5/(x^2‐4)) = 1

Algebra 2 - Learn to solve a rational equation by multiplying by the LCD (15/x)+((9x-7)/(x+2))=9

 Function Plot

Plotting: $false$

Main Topic: Trigonometric Equations

Related Topics

Solve the equation $\cos\left(135\right)=4\cos\left(\right)$

Related Videos

 Solution

 Videos

Pre-Calculus - Determining the triple angle of cosine to solve the equation cos(3x)=-1/2

Pre-Calculus - Solving a trigonometric equation with our angle divided by 4, 2sin(x/4)+sqrt(3) =0

Pre-Calculus - Solving trigonometric equations ex 8, cosx + sinx.tanx = 2

Tutorial - How to solve a equation using difference of two angles, cos(x + (pi)/6)-cos(x - (pi)/6)=1

Algebra 2 - Learning to solve rational equations in math class ((x+3)/(x‐2)) + (5/(x^2‐4)) = 1

Algebra 2 - Learn to solve a rational equation by multiplying by the LCD (15/x)+((9x-7)/(x+2))=9

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 Function Plot

Plotting: $false$

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Main Topic: Trigonometric Equations

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