Answer:
6.9282
step by step:
=( 2 x 24 )1/2
= ( 48 )0.5
= 6.9282
Cos( 6 x ) = 1/2
6 x = 60° ⇒ x 1 = 10°
6 x = 300° ⇒ x 2 = 50°
6 x = 420° ⇒ x 3 = 70°
6 x = 660° ⇒ x 4 = 110°
x 5 = 130°, x 6 = 170°, x 7 = 190° , x 8 = 230°, x 9 = 250°,
x 10 = 290°, x 11 = 310°, x 12 = 350°
Answer: there are 12 solutions on the interval ( 0 , 2π ).
4x(-2) + 4 x 7 4x5 + 2x(-1) =[-8 20]
[28 -2 ]
I would either round it to the 10th or 100th place.
