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Question 4 - Solve cos x = 1/2 - Trigonometric Functions CBSE
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Why is cos(0) = 1?
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![Ex 2.1, 9 - Find principal value of cos-1 (-1/root 2) - Ex 2.1](https://i2.wp.com/d1avenlh0i1xmr.cloudfront.net/4388afba-a378-47fc-923f-313418faf319/slide14.jpg)
Cos 9x 5x trigonometric chapter
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![Value of cos 0°. cos 30° .cos 45° . cos 60° . cos 90° is](https://i2.wp.com/d77da31580fbc8944c00-52b01ccbcfe56047120eec75d9cb2cbd.ssl.cf6.rackcdn.com/7ce27719-f685-45e9-9be0-09a1eb79fe53/slide20.jpg)
Value of cos 0°. cos 30° .cos 45° . cos 60° . cos 90° is
![Cos Values Chart](https://i2.wp.com/etc.usf.edu/clipart/43200/43217/unit-circle9_43217_lg.gif)
Cos Values Chart
![Ex 3.4, 6 - Find general solution of cos 3x + cos x - cos 2x = 0](https://i2.wp.com/d1avenlh0i1xmr.cloudfront.net/b6e84c7a-73af-45a2-872b-788657c45a1a/slide17.jpg)
Ex 3.4, 6 - Find general solution of cos 3x + cos x - cos 2x = 0
![Ex 3.4, 6 - Find general solution of cos 3x + cos x - cos 2x = 0](https://i2.wp.com/d1avenlh0i1xmr.cloudfront.net/ac5ebd7c-ac2c-4024-b868-6ddf55d582ea/slide19.jpg)
Ex 3.4, 6 - Find general solution of cos 3x + cos x - cos 2x = 0
![How do you solve and find the value of cos^-1(1/2)? | Socratic](https://i2.wp.com/useruploads.socratic.org/CWElR8lRtm5IxQlgh4CQ_trigonometric-values-of-special-angles.png)
How do you solve and find the value of cos^-1(1/2)? | Socratic
![Cos 0 | How to Find the value of Cos 0?](https://i2.wp.com/cdn1.byjus.com/wp-content/uploads/2019/03/cos-0.png)
Cos 0 | How to Find the value of Cos 0?
![Why is cos(0) = 1? | Socratic](https://i2.wp.com/useruploads.socratic.org/5UYolWNSfakzcXKL4Ipw_720px-Unit_circle_angles_color.svg.png)
Why is cos(0) = 1? | Socratic
![Question 4 - Solve cos x = 1/2 - Trigonometric Functions CBSE](https://i2.wp.com/d77da31580fbc8944c00-52b01ccbcfe56047120eec75d9cb2cbd.ssl.cf6.rackcdn.com/69b768ca-5563-4459-b20e-0d19f8a78fb0/slide41.jpg)
Question 4 - Solve cos x = 1/2 - Trigonometric Functions CBSE
![Question 6 - Find general solution of cos 3x + cos x - cos 2x = 0](https://i2.wp.com/d77da31580fbc8944c00-52b01ccbcfe56047120eec75d9cb2cbd.ssl.cf6.rackcdn.com/74100fab-dfba-4c12-8f1a-bee00de0a456/slide18.jpg)
Question 6 - Find general solution of cos 3x + cos x - cos 2x = 0
![Example 26 - Prove cos 2x cos x/2 - cos 3x cos 9x/2 = sin 5x](https://i2.wp.com/d77da31580fbc8944c00-52b01ccbcfe56047120eec75d9cb2cbd.ssl.cf6.rackcdn.com/8aebf86a-ee66-433f-b2bb-6fac08187007slide32.jpg)
Example 26 - Prove cos 2x cos x/2 - cos 3x cos 9x/2 = sin 5x