F5 數學問題

3.a)x² = 5
b)1/x = 10
c)2√x = 4
d)tanx + 1 = -1

5. a) k = -1
b)x = 180⁰

6. a) q = 1
b)x = -0.4 or x = -2.6

7. a) y = -1
b)x = 135⁰ or x = 315⁰