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zordoloom Group TitleBest ResponseYou've already chosen the best response.1
Do you still need help?
 2 years ago

sabika13 Group TitleBest ResponseYou've already chosen the best response.0
RS: (sin^2x+cos^2x)2cos^2x sin^2xcos^2x Thats how much i can simplify right side..
 2 years ago

zordoloom Group TitleBest ResponseYou've already chosen the best response.1
So here is how I proved it:
 2 years ago

zordoloom Group TitleBest ResponseYou've already chosen the best response.1
So, change sinx^4 to (1cosx^2)^2
 2 years ago

zordoloom Group TitleBest ResponseYou've already chosen the best response.1
You can expand that and you get 12cosx^2+cosx^4cosx^4=12cosx^2
 2 years ago

zordoloom Group TitleBest ResponseYou've already chosen the best response.1
Do you follow so far?
 2 years ago

zordoloom Group TitleBest ResponseYou've already chosen the best response.1
@sabika13 Should I continue?
 2 years ago

zordoloom Group TitleBest ResponseYou've already chosen the best response.1
When you simplify 12cosx^2+cosx^4cosx^4=12cosx^2, the left side becomes 12cosx^2=12cosx^2
 2 years ago

zordoloom Group TitleBest ResponseYou've already chosen the best response.1
That proves the identity.
 2 years ago

zordoloom Group TitleBest ResponseYou've already chosen the best response.1
Normally, when you prove an identity, you work on one side. In this problem I worked on the left side.
 2 years ago

sabika13 Group TitleBest ResponseYou've already chosen the best response.0
wait how does (12cosx^2)^2=12cos^2+cosx^4?
 2 years ago

zordoloom Group TitleBest ResponseYou've already chosen the best response.1
To summarize it: You have sin(x)^4cos(x)^4=12cos(x)^2 change sin(x)^4 >(1cos(x)^2)^2 You have: (1cos(x)^2)^2cos(x)^4=12cos(x)^2 Then expand (1cos(x)^2)^2 on the left side. You get 12cos(x)^2+cos(x)^4cos(x)^4=12cos(x)^2
 2 years ago

zordoloom Group TitleBest ResponseYou've already chosen the best response.1
Any better?
 2 years ago

zordoloom Group TitleBest ResponseYou've already chosen the best response.1
Then the: cos(x)^4cos(x)^4 cancel out.
 2 years ago

zordoloom Group TitleBest ResponseYou've already chosen the best response.1
Hope that helped.
 2 years ago

sabika13 Group TitleBest ResponseYou've already chosen the best response.0
im having problems expanding (1cos^2x)^2 shouldnt it be: 1cos^4x :S
 2 years ago

zordoloom Group TitleBest ResponseYou've already chosen the best response.1
So, (1cos^2x)(1cos^2x). Just foil out.
 2 years ago

sabika13 Group TitleBest ResponseYou've already chosen the best response.0
ohhh okay, but why is it not: (1cos^2x)(1+cos^2x)
 2 years ago

zordoloom Group TitleBest ResponseYou've already chosen the best response.1
It's squared. It's not a difference of squares.
 2 years ago

sabika13 Group TitleBest ResponseYou've already chosen the best response.0
ohh i think i get it...
 2 years ago

zordoloom Group TitleBest ResponseYou've already chosen the best response.1
Any number, or equation squared is the same as it times by itself. Example (6)^2= (6)*(6) or (3x2)^2= (3x2)(3x2). Do you get the point?
 2 years ago

zordoloom Group TitleBest ResponseYou've already chosen the best response.1
You don't change the signs inside the equation.
 2 years ago

sabika13 Group TitleBest ResponseYou've already chosen the best response.0
yeah so whats difference of squares then (if you dont mind me asking)
 2 years ago

zordoloom Group TitleBest ResponseYou've already chosen the best response.1
example x^24. When you factor it, you get (x2)(x+2). It's a^2b^2
 2 years ago

sabika13 Group TitleBest ResponseYou've already chosen the best response.0
ohhh thankkyou!!you helped me fix a very big misconception inmy head ;P
 2 years ago

zordoloom Group TitleBest ResponseYou've already chosen the best response.1
yep, no prob.
 2 years ago
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