solve for x for the first question , please show
steps.
if others are done that would be greatly appreciated
(e) 3sin²x -8sinx -3 =0
or, 3sin²x -9sinx + sinx -3 = 0
or, 3sinx(sinx -3) + 1(sinx -3) =0
or, (sinx -3) (3sinx +1) = 0
or, sinx =3 or sinx = -⅓
But sinx ≠ 3
so sinx =-⅓
So x = -19.47°
Which is in fourth quadrant.
So x = 360° - 19.47°
x = 340.53 ° ≈ 341° = 341 π /180
3. f(x) = x² +2x -5
g(x) = 3x-1
(f • g)(x) = (3x -1)² +2(3x-1) -5
= 9x² - 6x +1 +6x -2 -5
= 9x² -6
2.
5 . f(t) = 5t³ -4t² +t -3
f(1) = 5 - 4 +1 -3
= -1
f(4) = 5(4)³ -4(4)² +4 -3
= 320 - 64 +1
= 257
Average rate of change
= {257 -(-1)} /(4-1)
=258/3
=86 m/s
solve for x for the first question , please show steps. if others are done that...
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