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cscx/cotx+tanx=cosx
 Feb 3, 2014
 #1
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student789:

cscx/cotx+tanx=cosx



Hi Student789

co sec = 1/ sin

co t = 1/ tan

** The first letter of the most familiar ratio matches the 3'rd letter of the less used ratio,

Lets see,

1/sinx divided by 1/tanx + tanx = cosx

1/sinx multiplied by tanx + tanx = cosx

NOW, tanx =sinx/cosx

1/sinx times sinx/cosx + sinx/cosx = cosx

1/cosx + sinx/cosx = cosx

(1+sinx) / cosx = cosx

1+sinx = cos 2x

1+sinx = 1-sin 2x

sin 2x + sinx = 0

sinx(sinx + 1) = 0

sinx = 0 or sinx = -1

Can you finish it ?
 Feb 4, 2014

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