So I went pretty smoothly through most of the homework questions untill I reached these ones. I'd love some quick help since I have a test on this tomorrow!
1) Find solutions on the interval [0, 2pi]:
4sinxtanx - 3tanx + 20sinx - 15 = 0
2) Use an identity to find solutions on the interval [0, 2pi]:
sec^2x - 2tan^2x = 0
Any hints/clues/help/ANSWERS would be greatly appreciated.