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What is the exact value of the trigonometric expression in simplest form?

 

2cos(3π/4)−4sin(7π/6)

 Dec 5, 2018
 #1
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2 (-sqrt2/2)  - 4 (-1/2) = -sqrt 2 +2

 Dec 5, 2018
 #3
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−2-√-2

 

2+√2

 

2−√2

 

−2+√2

 

these are the only options ,I cant find which one matches with your response

Guest Dec 5, 2018
 #2
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I meant to respond to your response

 Dec 5, 2018
edited by Guest  Dec 5, 2018
edited by Guest  Dec 5, 2018
 #4
avatar+18439 
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-sqrt2 +2     =    2 - sqrt2      Third choice

 Dec 5, 2018
 #5
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That makes sense, i see it now.Thank You

Guest Dec 5, 2018

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