Math help

[Trotter]

OT but why did kman get temp baned?

We can't discuss the cause. I only posted that it was a suspension so that people would know. The software does not distinguish between a suspension or a perm ban.

 

[peterhuang913]

OT but why did kman get temp baned?

He got banned because he did something bad. Period.

 

[peterhuang913]

BIDMAS?

I've topped out at a level maths. Could someone help with this one.

cot 2θcosec2θ______
tan² θsec2θ + sec2θ = (cosθcot2θ)^n

and find n. Eek...

TI89 says n=2, long proof to come.

 

[Kharn]

He got banned because he did something bad. Period.

Thats a given, I was just wondering why.

 

[mssssee2]

KMAN, are you familiar with PEMDAS? Thats what you use to solve for X....
(this is dumb, but it is a trick to try an remember it.... learned this about 12 or more years ago.....)
Please (Parenthesis)
Excuse (Exponents)
My (Multiplication)
Dear (Division)
Aunt (Addition)
Sally (Subtraction)

Is it necessary that addition is before subtraction?
I mean in Algebra it is the exact thing.
5 - 3 is 5 + (-3)
We have learned them as :
Brackets/ Parenthesis
Exponents
Factorization
Restrictions
denominator elimination
multiplication/ Division
Addition/ Subtraction or Algebric SUM

mssssee2 we actually had someone do that in an exam at my high school!

Just LOL.

 

[peterhuang913]

TI89 says n=2, long proof to come.

Original eqn:
(cot2θ*csc2θ)/(tan²θ*sec2θ+sec2θ)

Factor out sec2θ in denominator:
(cot2θ*csc2θ)/(sec2θ(tan²θ+1))

tan²θ+1=sec²θ:
(cot2θ*csc2θ)/(sec2θ*sec²θ)

csc2θ/sec2θ=1/tan2θ & sec²θ in denominator is cos²θ in numerator:
(cot2θ*cos²θ)/tan2θ

cot2θ/tan2θ=cot²2θ:
cos²θ*cot²2θ=(cosθcot2θ)²

Simple.

 

[Nitestick]

Is it necessary that addition is before subtraction?

you're right multiplication and division, addition and subtraction are interchangeable. they just teach this acronym as a simple way of memorising the order of operations.

 

[Trotter]

As long as you work from left to right, you can interchange.

 

[Oreo]

i was taught BODMAS but there you go.

I dont think im allowed to disscuss why i got banned. It's quite simple, read this thread carefully.