Prove that: cos(π/5) cos(2π/5) cos(3π/5) cos(4π/5) cos(5π/5) cos(6π/5) cos (7π/5) = 1/128 - Sarthaks eConnect | Largest Online Education Community
Prove that: cos(π/5) cos(2π/5) cos(4π/5) cos(8π/5) = -1/16 - Sarthaks eConnect | Largest Online Education Community
![find the amplitude of sin pi by 5 plus I 1 - cos 5 by 5 - Maths - Relations and Functions - 13140947 | Meritnation.com find the amplitude of sin pi by 5 plus I 1 - cos 5 by 5 - Maths - Relations and Functions - 13140947 | Meritnation.com](https://s3mn.mnimgs.com/img/shared/content_ck_images/ck_5bc37dcb5fb65.png)