0=-x^2+2x+8
3x+5
7
cosx=1/2
find x
cos=1/2 [0,360]
i hate trigonometri
Findthegeneralsolutionof recurrencerelation S(k)−3s(k−1)−4s(k−2)=4k, k≥2
if tanx=1/5, cos2x=? Can you do this for 12. class student
if tanx=1/5, cos2x=?
6√x+30
x
3−1 partial fructions
