Find cos 4x in terms of cos x....

Channel:
PW Solutions
Subscribers:
515,000
Published on ● Video Link: https://www.youtube.com/watch?v=kf2cPwnePZg


Duration: 1:25
0 views
0

Find cos 4x in terms of cos x....
📲PW App Link - https://bit.ly/YTAI_PWAP
🌐PW Website - https://www.pw.live



Other Videos By PW Solutions


2024-05-22Prove that : \(cos\ 4x = 1 - 8sin^{2}\text{xco}s^{2}x\)...
2024-05-22Prove that : \((cos\ A + cos\ B)^{2} + (sin\ A - sin\ B)^{2} = 4cos^{2}(\frac{A + B}{2})\)...
2024-05-22Prove that \(\frac{cos\ 2\theta}{1 + sin\ 2\theta} = tan(\frac{\pi}{4} - \theta)\)...
2024-05-22Prove that \(\frac{1 + sin\ \theta + cos\ \theta}{1 + sin\ \theta + cos\ \theta} = tan\frac{\the...
2024-05-22Prove that \(\frac{1 + sin\ 2\theta + cos\ 2\theta}{1 + sin\ 2\theta - cos\ 2\theta} = cot\ \the...
2024-05-22Prove that \(\frac{sin\ 2\theta}{1 - cos\ 2\theta} = cot\ \theta\)...
2024-05-22Given \(\text{cos\ }\theta = \frac{3}{5},\) find \(\cos\frac{1}{2}\theta\)...
2024-05-22Prove that \(\frac{sin\ 2\theta}{1 + cos\ 2\theta} = tan\ \theta\)...
2024-05-22Given \(\cos\theta = \frac{3}{5},\) find \(sin\ 2\theta\)...
2024-05-22Verify the identity 1 – cos 2x = tan x sin 2x....
2024-05-22Find cos 4x in terms of cos x....
2024-05-22The demand curve of Pepsi will not shift with rise or fall in its price....
2024-05-22\(\frac{sin\ x - sin\ y}{cos\ x + cos\ y} = tan\ \frac{x - y}{2}\)...
2024-05-22\(\frac{sin\ 5x + sin\ 3x}{cos\ 5x + cos\ 3x} = tan\ 4x\)...
2024-05-22\(sin\ 2x + 2\ sin\ 4x + sin\ 6x = 4\ cos^{2}x\ sin\ 4x\)...
2024-05-22\(\text{si}n^{2}6x - sin^{2}4x = sin\ 2x\ sin\ 10x\)...
2024-05-22\(\text{co}s^{2}2x - cos^{2}6x = sin\ 4x\ sin\ 8x\)...
2024-05-22\(sin(n + 1)xsin(n + 2)x + cos(n + 1)xcos(n + 2)x = cos\ x\)...
2024-05-22\(cos(\frac{3\pi}{4} + x) - cos(\frac{3\pi}{4} - x) = - \text{sin\ x}\)...
2024-05-22Prove the following : \(cos(\frac{\pi}{4} - x)cos(\frac{\pi}{4} - y) - sin(\frac{\pi}{4} - x)sin...
2024-05-22If \(\frac{sin\ (x + y)}{sin\ (x - y)} = \frac{a + b}{a - b},\) then show that \(\frac{\text{tan...