L
lepkon_517


$1.tanx – 2cotx -1 =0 $
$2. 8sinxcosx . cos2x = -1$
$3. Cos2x = 3sin2x + 1$
$4. Sin5x – cos6x = -1$
$5. Cos3x + cos5x = cosx$
$6. 3tanx = cotx$
$7. Cos5x.cosx = cos6x$
$2. 8sinxcosx . cos2x = -1$
$3. Cos2x = 3sin2x + 1$
$4. Sin5x – cos6x = -1$
$5. Cos3x + cos5x = cosx$
$6. 3tanx = cotx$
$7. Cos5x.cosx = cos6x$
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