Looking for a math expert to help solve some problems.
simple using double angle formula:
2cos^2 (pi/7) -1
60 freelancers are bidding on average $12/hour for this job
Hi, dear friend, I am an expert in math and physics. I have a lot of experiences in many projects. We can discuss for your task detail more in chat. Best regards,
Hi, I have experience in mathematics and can solve this type of problems. I have done the similar type jobs earlier. Looking forward for your positive response. Best,