2,235 reputation
3924
bio website
location
age 37
visits member for 3 years, 5 months
seen 10 hours ago

2d
comment Some help with sin and cos
For first part $a=\sin^2\pi/2$, $b=\cos^2\pi/2$ ; $\Large\frac{1-\frac{a}{b}}{1+\frac{a}{b}}=\frac{\frac{b-a}{b}}{\frac{b+a}{b}}= \frac{b-a}{b+a}$ use $\sin^2\theta+\cos^2\theta=1$
Oct
17
comment A problem regarding table decorations
if all 3 must be of different color then answer is minimum of r,g,b; if color does not matter then answer is integer part of (r+g+b)/3
Sep
30
awarded  Explainer
Sep
27
comment how to solve liner equations with decimal values like 2n=0.58(12 - n)
$29(12-n)=30(12-n)-(12-n)$, is one of the tricks to avoid 29
Sep
17
answered Birdwatching question
Sep
14
comment Need explanation how we got right hand side of expression from the left hand side
$\large \frac{n(n-1)...(n-(r-1))}{r!}=\frac{n(n-1)...(n-(r-1))}{r!}.\frac{(n-r)!}{(n-r)!‌​}=\frac{n!}{r!(n-r)!}$
Sep
14
revised Finding dimensions using quadratic formula
answer corrected
Sep
14
answered Finding dimensions using quadratic formula
Sep
14
answered Problem Solving quadratics
Sep
14
comment Problem Solving quadratics
If $a$ and $b$ are the sides of paddock, then $2(a+b)=600$ and $a \times b=21600$
Sep
14
comment How to find a Boolean expression for a combinational logic circuit?
I am not sure but I think you will have to simplify this to get the required expression:"$Z=-(-(A \wedge B) \vee -(A \wedge B) \wedge -(B \wedge C)) \wedge (-(A \wedge B) \wedge -(B \vee C))$"
Sep
14
comment How to find a Boolean expression for a combinational logic circuit?
@CarlosMendez, pls see the edited answer
Sep
14
revised How to find a Boolean expression for a combinational logic circuit?
improved answer
Sep
14
comment How to find a Boolean expression for a combinational logic circuit?
you will have to check for all the different input combinations
Sep
14
answered How to find a Boolean expression for a combinational logic circuit?
Sep
14
comment Is the empty set a member of itself
math.stackexchange.com/questions/302064/…
Sep
13
comment Analysis of the function $y=x^{\frac{1}{x}}$
yes, you are right
Sep
13
comment Analysis of the function $y=x^{\frac{1}{x}}$
if $x=-3/2$ then $y=\frac{1}{(\sqrt{-3/2})^3}$
Sep
13
comment Analysis of the function $y=x^{\frac{1}{x}}$
@Dave, for both $-3/2$ and $-1.5$, excel is not giving any answer
Sep
13
asked Analysis of the function $y=x^{\frac{1}{x}}$