One of the formulas is: .Solve the following using the double-angle formulas: .
Then we have: .
Since is in Quadrant 1, where sine is positive: .
Yeah... I'll get professional help with this tomorrow if I can...
Until then... I love you guys XD
The question said to solve the following using the double angle formulas. but I have like no clue what the double angle formula possibly has to do with any of this..