Dear all, you have forgotten additional solutions: Not only PI/3 but also 2PI/3 Not only 4PI/3 but also 5PI/3 Not only PI/6 but also 5PI/6 Not only 7PI/6 but also 11PI/6
too easy for olimpiad, it is just extended math for secondary school. And wrong answer on video because there are infinately many more solutions... x ∈ {π/6 + kπ/2; π/3 + kπ/2}, where k∈Z
Sinx=±sqrt(3)/2
So close, but failed to stick the landing.
((3)^.5)/2 not ((3^.5)/4 (3/4)^.5=((3)^.5)/2
Sinx=root 3/2=sin60 degree
Dear all, you have forgotten additional solutions:
Not only PI/3 but also 2PI/3
Not only 4PI/3 but also 5PI/3
Not only PI/6 but also 5PI/6
Not only 7PI/6 but also 11PI/6
يوجد خطأ حيث جذر 4 يساوي 2
too easy for olimpiad, it is just extended math for secondary school. And wrong answer on video because there are infinately many more solutions... x ∈ {π/6 + kπ/2; π/3 + kπ/2}, where k∈Z