A) 3
B) 4
C) 5
D) 1
Correct Answer: C
Solution :
(c): \[AC=\sqrt{{{3}^{2}}+{{4}^{2}}}=5\] \[\therefore 3.sin\theta +4cos\theta \] \[=3\times \frac{3}{5}+4\times \frac{4}{5}\] \[=\frac{9}{5}+\frac{16}{5}=\frac{25}{5}=5\]
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