Evaluate- 4(sin^4 30
+ cos^4 60) - 3(cos^2 45 -
sin^2 90)
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Given that 4(sin^4 30 + cos^4 60) - 3(cos^2 45 - sin^2 90)
We know that, sin 30 = 1/2, cos 60 = 1/2, cos 45 = 1/root 2 and sin 90 = 1
Substituting the values, we get
4(1/16 + 1/16) - 3(1/2 - 1)
4(1/8) - 3(-1/2)
1/2 + 3/2
4/2
2
We know that, sin 30 = 1/2, cos 60 = 1/2, cos 45 = 1/root 2 and sin 90 = 1
Substituting the values, we get
4(1/16 + 1/16) - 3(1/2 - 1)
4(1/8) - 3(-1/2)
1/2 + 3/2
4/2
2
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