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OpenStudy (anonymous):
2sin^2x - 1 = sin^2x cos^2x ... how would i prove this identity?
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OpenStudy (anonymous):
This is not an identity. For x=0 -1 =0 impossible
OpenStudy (anonymous):
agree with Dr. Saab ^^^
OpenStudy (marco26):
not valid
OpenStudy (anonymous):
okay thank you !
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