Answer:
12226.8
Step-by-step explanation:
I don’t really understand ur question but the fraction 2/10 in simplest form is 1/5
4[3(5+2)] = 95 - 4.3
4[3(10)] = 93.7
4[30] = 93.7
120 = 93.7 ...CAN'T BE
Answer is the second one.
They are not equal
Hello,
Since 3sin x-4sin^3x=sin (3x) (*****)
3sin x-4sin^3x=-1
==>sin (3x)=-1
==>3x=3π/2 +2kπ
==>x=π/2+2kπ/3, k being an integer
(*****)
sin (3x)=sin(x+2x)=sin x cos2x+cos x sin 2x
=sin x(cos²x-sin²x)+2cos²x sin x
=sin x(cos²x+2cos²x-sin²x)
=sinx(3(1-sin²x)-sin²x)
=3sin x-4sin^3x
