Answer:
2
Step-by-step explanation:
i used a calculator
sin²x
we have
(1 − cos x)(1 + cos x)=1-cos²x
Remember that
sin²x+cos²x=1 ------> i-cos²x=sin²x
therefore
(1 − cos x)(1 + cos x)=sin²x
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( x + 2 ) ( x +3 )
