Given that
show that
so replace with 2x
and using the indentity
Can I rearrange and replace it like this?
So I'll get, ;
cancel the two's and replace sec^2y
so after simplifying I get,
Can someone please help me from here, as I have tired to rearrange it but don't get the desired expression.
And I am not even sure what I have done so far is correct, which is probably why I am not getting the right expression?
Please check my working,
Thank you!
The identity is:
For any .
substitute
since , then the last one can be written as:
Hence:
Not substitute this in
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This is wrong.
You probably multiply this equation by 2, and you canceled the 2`s from the right side.
Which is wrong, one of this 2`s is inside the angle of a trigonometric function.
You can not cancel it with another 2 which outside the angle.