Giải pt lượng giác sau
Cos x = -√3/2

0

Step-by-step explanation:

Solution for cosx=-3/2 equation:

cos((3*pi)/5)*cos((3*pi)/20) = 0

(60*x^3)/(60*x^5) = 0

cos((3*pi)/5)*cos((3*pi)/20) = 0

cos((3*x)/5)*cos((3*x)/20) = 0

1.5/100 = 0

1) 2 ||| 2)A

Step-by-step explanation:

the points are 2 around for the first one

and for number two the line must be parallel to the rectangular side :)