A) \[45{}^\circ ,\,\,30{}^\circ \,\,and\,\,80{}^\circ \]
B) \[40{}^\circ ,\,\,60{}^\circ \,\,and\,\,80{}^\circ \]
C) \[30{}^\circ ,\,\,60{}^\circ \,\,and\,\,90{}^\circ \]
D) All of these
E) None of these
Correct Answer: C
Solution :
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