In $ riangleABC$, if $\gamma=90^{\circ}$, then according to law of cosine the value of the square of the side c is defined as:

Question

Accepted Answer

$c^{2}=a^{2}+b^{2}$

Answer

$c^{2}=b^{2}+c^{2}-2bc$

Answer

$c^{2}=a^{2}+b^{2}-2ab\cos\gamma$

Answer

$c^{2}=b^{2}+c^{2}+2bc\cos\gamma$