1 - cot^4x = 2csc²x - csc^4x
the ^4 means to the fourth power. The x's are not supposed to be raised.
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1 - cot^4x = 2csc²x - csc^4x
the ^4 means to the fourth power. The x's are not supposed to be raised.
On the left side of the parentheses, rewrite:
Now, expand and you will see it.
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