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
![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
![Prove that \sin \frac{8\pi}{3} \cos \frac{23\pi}{6} + \cos \frac{13\pi}{3} \sin\frac{35\pi}{6} = \frac{1}{2} | Homework.Study.com Prove that \sin \frac{8\pi}{3} \cos \frac{23\pi}{6} + \cos \frac{13\pi}{3} \sin\frac{35\pi}{6} = \frac{1}{2} | Homework.Study.com](https://homework.study.com/cimages/multimages/16/study_unit_circle_013049540603873541033.png)
Prove that \sin \frac{8\pi}{3} \cos \frac{23\pi}{6} + \cos \frac{13\pi}{3} \sin\frac{35\pi}{6} = \frac{1}{2} | Homework.Study.com
![Prove that `(i) " tan"^(2) .(pi)/(3) + 2cos^(2) .(pi)/(4)+ 3 sec^(2).(pi)/(6)+ 4 cos^(2).(pi - YouTube Prove that `(i) " tan"^(2) .(pi)/(3) + 2cos^(2) .(pi)/(4)+ 3 sec^(2).(pi)/(6)+ 4 cos^(2).(pi - YouTube](https://i.ytimg.com/vi/gJC2t8g1x0E/maxresdefault.jpg)