3sin 2 30° +2 tan 60° - Scos? 45°
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0
Answer:
=3(
2
1
)
2
+2(
3
)
2
−5(
2
1
)
2
=
4
3
+6−
2
5
=
4
3+24−10
=
4
17
=4
4
1
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