![cos^4 (pi/8) + cos^4 (3pi/8) + cos^4 (5pi/8) + cos^4 (7pi/8) , TRIGO MULTIPLE ANGLE | CBSE XI MATHS - YouTube cos^4 (pi/8) + cos^4 (3pi/8) + cos^4 (5pi/8) + cos^4 (7pi/8) , TRIGO MULTIPLE ANGLE | CBSE XI MATHS - YouTube](https://i.ytimg.com/vi/5MTuDScMM8w/maxresdefault.jpg)
cos^4 (pi/8) + cos^4 (3pi/8) + cos^4 (5pi/8) + cos^4 (7pi/8) , TRIGO MULTIPLE ANGLE | CBSE XI MATHS - YouTube
Find the value of the expression cos^4 π/8 + cos^4 3π/8 + cos^4 5π/8 + cos^4 7π/8 - Sarthaks eConnect | Largest Online Education Community
![cos4 pi / 8+cos4 3pi /8 + cos4 5pi / 8 +cos4 7pi /8 =3/2 - Maths - Trigonometric Functions - 740268 | Meritnation.com cos4 pi / 8+cos4 3pi /8 + cos4 5pi / 8 +cos4 7pi /8 =3/2 - Maths - Trigonometric Functions - 740268 | Meritnation.com](https://s3mn.mnimgs.com/img/shared/userimages/mn_images/image/14Mar2011-8-1.png)
cos4 pi / 8+cos4 3pi /8 + cos4 5pi / 8 +cos4 7pi /8 =3/2 - Maths - Trigonometric Functions - 740268 | Meritnation.com
![साबित करें कि `sin^(4) . ( pi)/(8) + sin^(4) . ( 3pi)/(8) + sin^(4). ( 5pi)/(8) + sin^(4). - YouTube साबित करें कि `sin^(4) . ( pi)/(8) + sin^(4) . ( 3pi)/(8) + sin^(4). ( 5pi)/(8) + sin^(4). - YouTube](https://i.ytimg.com/vi/T8oD30f07LM/maxresdefault.jpg)
साबित करें कि `sin^(4) . ( pi)/(8) + sin^(4) . ( 3pi)/(8) + sin^(4). ( 5pi)/(8) + sin^(4). - YouTube
![Value of cos^3 (pi/8)cos^3 ((3pi)/8) + sin^3 (pi/8)sin^3 ((3pi)/8) is | 12 | JEE MAIN | MATHS | ... - YouTube Value of cos^3 (pi/8)cos^3 ((3pi)/8) + sin^3 (pi/8)sin^3 ((3pi)/8) is | 12 | JEE MAIN | MATHS | ... - YouTube](https://i.ytimg.com/vi/AvjeNj_50Fw/maxresdefault.jpg)