There is a trig identity called the sum of 2 angles for sin its<span>
sin(a+b)=sin(a)cos(b)+cos(a)(sin(b)
</span>
You will need to use it. So in your question split the 4x in 2 equal parts 2x and 2x
<span>
</span><span>sin(4x)=sin(2x+2x)
</span>Now using the expansion above you will get
<span>sin(2x+2x)=sin(2x)×cos(2x)+cos(2x)×sin(2x)
</span>And it will simplify to
<span><span>2sin(2x)cos(2x)
I hope this helps you! Good luck :)</span></span>
Imagine you're looking from the views given. If not, look for similar objects in your home and you'll have your reference from there
Answer:
-4
Step-by-step explanation:
If there is 1-5 then we should do – from last I mean we should do -5-1 you will not understand like this I will show you by sep wise step
= -5
-1
————
ans -4
If you will not understand Look here when there will be -5-4 then what should we do? There is -5-4 So we should do –
If there is -4+2 then you don't know how to do it. So note this: + × + = +
+ × - = -
- × + = -
I know this much only. If you have more doubt then ask for your Maths teacher.
Answer:
For (fg)(x)
(fg) (x) = 4x^4 - 8x^3 -11x^2 -3x
With no restrictions on the x
Step-by-step explanation:
To find (fg) (x) = f(x) . g(x)
We need to multiply f(x) with g(x)
(fg) (x) = (2x^2 -5x -3) * (2x^2 + x)
fg(x) = 4x^4 + 2x^3 - 10x^3 - 5x^2 -6x^2 -3x
fg(x) = 4x^4 - 8x^3 -11x^2 -3x
