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Question

Find the value of
4(sin430o+cos460o)3(sin245o2cos245o)

A
1
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B
2
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C
0
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D
3
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Solution

The correct option is B 2
4(sin4300+cos4600)3(sin24502cos2450)
Put the value of sin and cos we get:
=[(12)2+(12)4]3[(12)22(12)2]
=4(116+116)3(122(12))
=12+32=2

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