109. What is the value of $\tan\dfrac{11\pi}{4} + \sin\dfrac{15\pi}{4}\cos\dfrac{13\pi}{4}$? (1) $-\dfrac{3}{2}$ (2) $-\dfrac{1}{2}$ (3) $\dfrac{1}{2}$ (4) $\dfrac{3}{2}$
\textbf{109.} What is the value of $\tan\dfrac{11\pi}{4} + \sin\dfrac{15\pi}{4}\cos\dfrac{13\pi}{4}$?
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(1) $-\dfrac{3}{2}$ \qquad
(2) $-\dfrac{1}{2}$ \qquad
(3) $\dfrac{1}{2}$ \qquad
(4) $\dfrac{3}{2}$
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