I don't understand how to do this.
Help, please? :|
Help, please? :|
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This is actually not true. Unless you wrote down the problem wrong, simplifying the more complex part of this relation simplifies to -2*cot(x)^2. I will show you how:
To begin, the sin(x)^2-1 on the denominator can simplify to -cos(x)^2, by the identity 1-sin(x)^2=cos(x)^2.
This becomes:
(2/sin(x)^2) / (-1/cos(x)^2)
Multiply by the reciprocal:
(2/sin(x)^2) * (-cos(x)^2) = -2 * (cos(x)^2/sin(x)^2) = -2 cot(x)^2
To begin, the sin(x)^2-1 on the denominator can simplify to -cos(x)^2, by the identity 1-sin(x)^2=cos(x)^2.
This becomes:
(2/sin(x)^2) / (-1/cos(x)^2)
Multiply by the reciprocal:
(2/sin(x)^2) * (-cos(x)^2) = -2 * (cos(x)^2/sin(x)^2) = -2 cot(x)^2