An impossible cosine branch
An impossible cosine branch
4 marks
TGM Original
Solve 2cos2x-5cos x+2=0 for -180 <= x 180. Give all solutions exactly.
Solution:
Solution locked
680+ questions here come with free worked solutions. A free account saves your questions and progress; this one needs tuition enrolment.
Create a free account to practise similar questions.
Answer:\(x=-60^\circ,60^\circ\)
Need help? Join our JC Math tuition classes.
Learn more