Answer:
1) cos (3x)
2)
Step-by-step explanation:
Given expression:
cos(7x)cos(4x)+sin(7x)sin(4x)
By using the trigonometric identity
cos(a)cos(b) + sin(a)sin(b) = cos(a-b)
we have:
cos(7x)cos(4x)+sin(7x)sin(4x) = cos(7x - 4x)
= cos(3x)!
part 2:
tan (-π/12)
by using property tan(-x)= - tan(x)
=-tan(π/12)
= - tan(π/6 / 2)
Using tan(x/2) =
= -
cos π/6 =
= -
= -
= - 2+
=
!
Answer:
One: D
Two: D
Step-by-step explanation:
<em><u>One</u></em>
The trick here is to get rid of the cube root and the square root.
<u>Step One</u>
Cube both sides of the given equation.
(m^3)^3 = (∛√n)^3
m^9 = √n
<u>Step Two</u>
Square both sides
(m^9)^2 = (√n)^2
m^18 = n
So the answer is D.
<em><u>Two</u></em>
There is no way to get any kind of answer out a linear equation that transforms itself into an expression of divided powers. It is just impossible.
D again
Answer:
1.09 is the correct answer
I believe the correct expression would be: x * 70%
You should double check, and I hope this helped you! =)
Seems to be aritmetic
an=a1+d(n-1) is aritmetic
a1=fist term
d=comon difference
n=which term
a4-a2=2d where d is the common difference
26-14=12
12=2d
6=d
so
a2-6=a1
14-6=8
an=8+6(n-1)
expand
an=8+6n-6
an=6n+2
3rd option