![If cos 25 degrees + sin 25 degrees = k, then cos 20 degrees is equal to - Maths - Trigonometric Functions - 12700435 | Meritnation.com If cos 25 degrees + sin 25 degrees = k, then cos 20 degrees is equal to - Maths - Trigonometric Functions - 12700435 | Meritnation.com](https://s3mn.mnimgs.com/img/shared/content_ck_images/ck_361d4472dc7f0c6e80c9cd61fa5ba933.png)
If cos 25 degrees + sin 25 degrees = k, then cos 20 degrees is equal to - Maths - Trigonometric Functions - 12700435 | Meritnation.com
![If cos 25 degrees + sin 25 degrees = k, then cos 20 degrees is equal to - Maths - Trigonometric Functions - 12700435 | Meritnation.com If cos 25 degrees + sin 25 degrees = k, then cos 20 degrees is equal to - Maths - Trigonometric Functions - 12700435 | Meritnation.com](https://s3mn.mnimgs.com/img/shared/content_ck_images/ck_441ceb490197f6538a641649638ec09c.png)
If cos 25 degrees + sin 25 degrees = k, then cos 20 degrees is equal to - Maths - Trigonometric Functions - 12700435 | Meritnation.com
Solved] Use these sum and difference identities to answer the question below. sin(x+y)=sinxcosy+cosxsiny sin(xy)=sinxcosycosxsiny cos(x+y)=cosxcosys... | Course Hero
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