Question

2sin230° - 3cos245° + tan2 60°
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Answer 1

sin 30°= 1/2, 2 sin2 30°=1/2

cos 45°=1/root 2, 3 cos2 45°=3/2

tan 60°= root3, tan2 60°= 3

1/2 - 3/2 + 3 = 1/2 - 3/2 + 6/2 = 8/2 = 4

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Answer 2

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