A) \[90{}^\circ \]always
B) \[0{}^\circ \] always
C) \[0{}^\circ \]to \[90{}^\circ \]
D) \[0{}^\circ \] to \[180{}^\circ \]
Correct Answer: A
Solution :
(a) \[90{}^\circ \]alwaysYou need to login to perform this action.
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