The explanation is here. the rest of the questions must be do by yourself.
Evaluate the expression x^3 - (3 + x)^2 for =4x
1 answer:
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Answer:
Step-by-step explanation:
we take the LHS so here goes,
since ,
the identity becomes,
now, we know,
and
the identity becomes,
sin A and cos A cancel out it becomes zero
Splitting the denominator the identity becomes
Hence,