If tg(x)=p, what’s cos(2x)?
Dr.Peterson Elite Member Joined Nov 12, 2017 Messages 16,089 Apr 20, 2021 #2 maria99 said: If tg(x)=p, what’s cos(2x)? Click to expand... I would first find sin(x) or cos(x), and then use that to find cos(2x). Please show us what you have tried, so we can have some idea of what help you need.
maria99 said: If tg(x)=p, what’s cos(2x)? Click to expand... I would first find sin(x) or cos(x), and then use that to find cos(2x). Please show us what you have tried, so we can have some idea of what help you need.