SOLUTION: I need help please im practicing for exams 1.)Find the absolute value of the complex number z=-8-12i 2)The exact value of sec 3pie/2 is what? 3)What is the domain of the fun

Question 761476: I need help please im practicing for exams

1.)Find the absolute value of the complex number z=-8-12i
2)The exact value of sec 3pie/2 is what?
3)What is the domain of the function f(x)=tan x
4)Find the exac value of sin inverse (sin 5pie/4)
5)whats the equivalence expression for the composition cot(arctan x)
6)whats the period of y=cos2x?
7)the phase shift of y=2sin(x+3)+1
8)The central angle theta subtended by an arc of length s=6cm on a circle of radius r=2cm find the area of the sectoe determined by theta.
16)csc78 deg 24� is equivalent to what trigometric function

Answer by MathLover1(20850) (Show Source): You can put this solution on YOUR website!
The absolute value of a complex number is written as
It is a nonnegative real number defined as:

the absolute value of the complex number will be

2) The exact value of is

3) What is the domain of the function

4)Find the exact value of sin inverse (sin 5pie/4)
(result in radians)

5) whats the equivalence expression for the composition cot(arctan x)

6) whats the period of ?
periodic in with period
7) the phase shift of
it is periodic in with period
phase shift:
vertical shift:
8)The central angle theta subtended by an arc of length s=6cm on a circle of radius r=2cm
find the area of the sector determined by theta.
circle central angle

16)csc78 deg 24� is equivalent to what trigonometric function
� � =�
�=

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