Trig Identities and finding real numbers
I am currently finishing a review of precal for my cal I class. It has been a little while since i have used this kind of math so i am at a stand still. I have five questions.
1. find and equivalent expression involving only sines and cosines, and then simplify it.
2. same as above except:
3.find sec(x) if tan(x)=3/4 and x is in quadrant one.
4. find all real numbers in the interval [0,2pi] that satisfy the equation:
5. same as #4 except:
I struggled with these kind of problems when i was taking pre-cal. I would greatly appreciate it if someone could help me solve these and teach me a little more about the subject.