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Mathematics
Mathematics
Problem
Evaluate
sin
(
−
17
π
4
)
+
cos
(
−
7
π
3
)
\displaystyle \sin\left(-\dfrac{17\pi}{4}\right)+\cos\left(-\dfrac{7\pi}{3}\right)
sin
(
−
4
17
π
)
+
cos
(
−
3
7
π
)
. a)
−
2
2
−
1
2
-\dfrac{\sqrt{2}}{2}-\dfrac{1}{2}
−
2
2
−
2
1
b)
2
2
+
1
2
\dfrac{\sqrt{2}}{2}+\dfrac{1}{2}
2
2
+
2
1
c)
−
2
2
+
1
2
-\dfrac{\sqrt{2}}{2}+\dfrac{1}{2}
−
2
2
+
2
1
d)
−
2
2
+
3
2
-\dfrac{\sqrt{2}}{2}+\dfrac{\sqrt{3}}{2}
−
2
2
+
2
3
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