A) \[a+b\]
B) \[|a|+|b|\]
C) \[a-b\]
D) \[\sqrt{{{a}^{2}}+{{b}^{2}}}\]
Correct Answer: D
Solution :
Maximum value of\[a\cos \theta +b\sin \theta \]is\[\sqrt{{{a}^{2}}+{{b}^{2}}}\]
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