Editor
Editor
 Sep 18, 2022
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In $\triangleABC$, if $\gamma=90^{\circ}$, then according to law of cosine the value of the square of the side c is defined as:
Difficulty: Easy
A: 
$c^{2}=b^{2}+c^{2}-2bc$
B: 
$c^{2}=a^{2}+b^{2}-2ab\cos\gamma$
C: 
$c^{2}=b^{2}+c^{2}+2bc\cos\gamma$
D: 
$c^{2}=a^{2}+b^{2}$
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NETNUST Entry TestMathematicsFundamentals of Trignometry