(cos11+sin11)^-2=-1
+37084 Not sure what you are asking....is this written correctly? There is no variable.
Are you dealing in RADIANS?
+118653 (cos11+sin11)^-2=-1
\(\frac{1}{(cos11+sin11)^2}=-1\)
This statement must be false since the square of a real number cannot be negative
Now i am playing :)
\(\frac{1}{cos^211+sin11^2+2sin11cos11}=1\\ \frac{1}{1+2sin11cos11}=1\\ \frac{1}{1+sin22}=1\\ 1=1+sin22\\ 0=sin22\;\;\;false\)
