4(Sin^4 30°+ Cos^4 60°) - 3 (cos^2 45-sin^2 90)= 2
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Answer:
((
2
1
)
4
+(
2
1
)
2
)−3((
2
1
)
2
−1
2
)−(
2
3
)
2
=4((
16
1
)+(
4
1
))−3((
2
1
)−1)−(
4
3
)
=4((
16
1
)+(
16
4
))−3((
2
1
)−1)−(
4
3
)
=4(
16
5
)−3(
2
−1
)−(
4
3
)
=
4
5
+
2
3
−
4
3
=
4
5
−
4
3
+
2
3
=
4
2
+
2
3
=
2
1
+
2
3
=
2
4
=2
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