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Find the sum of all values of θ in degrees such that 90◦ < θ < 180◦ and the identity

$sin θ + sin(2θ)$/ $1 + cos θ + cos(2θ)$ = tan θ does not hold

 Oct 31, 2020
 #2
avatar+112471 
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You need more brackets to make your meaning clear.

 Nov 1, 2020
 #3
avatar+79 
+1

Ok I will do that

AaronWang2004  Nov 1, 2020

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