I need help on reviewing for my midterm on Monday. I just need to correct my answers on my tests/quizses. I redone all the problems I got wrong, but I need to make sure they are correct.
1. 3cos2Θ = .55
2. tan2Θ = 2.5
3. sec2Θ = 4
4. 2sin (2pi/3)Θ = -1 (I need extra help and explanation for this one please)
1. 3cos2Θ = .55
2. tan2Θ = 2.5
3. sec2Θ = 4
4. 2sin (2pi/3)Θ = -1 (I need extra help and explanation for this one please)