sin(2x) =
Anonymous Quiz
82%
2 sin(x)cos(x)
6%
sin(x)^2 cos(x)^2
5%
1/2 sin(x) cos(x)
6%
None of these
cos(2x) =
Anonymous Quiz
24%
cos^2 x - sin^2 x
9%
2cos^2 x - 1
14%
1 - 2sin^2 x
53%
All of the above
tan(2x) =
Anonymous Quiz
81%
2 tan(x)/ 1-tan^2(x)
8%
tan(x)/ 1-tan^2(x)
4%
tan(x)/ 2-tan^2(x)
7%
2 tan(x)/ 1+tan^2(x)
to have a reverse function we need to sure that
Anonymous Quiz
27%
the function is one to one
7%
Df = Rg AND Dg = Rf [we suppose that f,g are reversed functions]
65%
A&B
1%
None of these
ازاي تجيب الدالة العكسية بعد ماتتاكد انها one to one
مثلا
f(x) = x + 1 // f(x) = y
y = x + 1 // x فطرف لوحدها
x = y - 1 // بدل الرموز الاكس والواي
يبقى الدالة العكسية f(x) = x -1
مثلا
f(x) = x + 1 // f(x) = y
y = x + 1 // x فطرف لوحدها
x = y - 1 // بدل الرموز الاكس والواي
يبقى الدالة العكسية f(x) = x -1