Question

4 sin²x - 3 sin x = 0

Answer 1

Answer:

if sinx is 0 then  x = 2 n π  , n = natural number

if sinx is not 0 then, cancel sin x on both sides,

4 cos² x - 2 sin x = 3

4 - 4 sin² x - 2 sin x - 3 =0 

4 sin² x + 2 sin x -1 = 0

Δ = 4 + 16 = 20

sin x = (-2 +- 2√5) / 8    =  (-1 +- √5) / 4  = 

 x =  2 n π + 18 deg  or  2 n π (- 54 deg  = 126 deg)

Answer 2

Answer:

Step-by-step explanation:

4 2=16

42=4×4=16

3 2=9

32=3×3=9