How to find $x$ such that $cos 2x - cos4x = frac12$ and $0<x<3$? [closed]
Clash Royale CLAN TAG #URR8PPP up vote -1 down vote favorite How to solve this trigonometric equation, giving your answer in exact form: $$cos 2x - cos4x = frac12$$ where $0 < x <3$ trigonometry share | cite | improve this question edited Sep 9 at 14:41 Bernard 112k 6 36 105 asked Sep 9 at 13:55 Andrew Hoang 4 closed as off-topic by amWhy, José Carlos Santos, user99914, Deepesh Meena, user91500 Sep 10 at 9:27 This question appears to be off-topic. The users who voted to close gave this specific reason: " This question is missing context or other details : Please improve the question by providing additional context, which ideally includes your thoughts on the problem and any attempts you have made to solve it. This information helps others identify where you have difficulties and helps them write answers appropriate to your experience level." – amWhy, José Carlos Santos, ...