thanks for that but im still really struggling to get the final answer.
for 1. i've got to 4sinsquared theta + 7 sin theta -2=0 do i then factorise or what.
Mr F says: Yes. Or use the quadratic formula to solve for . Only one of the solutions for will be valid.
2.ive mulitplied by cos squared theta and got
cos squared theta - sin squared theta / cos squared theta + sin squared theta. not sure what to do next
Mr F says: Surely you're familar with the double angle formulae and the Pythagorean Identity.