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Question

The value of
4(sin4300+cos4600)(cos2450sin2900)+tan4450cot2450 is

A
0
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B
1
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C
14
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D
-2
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Solution

The correct option is C 14
4(sin4300+cos4600)(cos2450sin2900)+tan4450cot2450
=4[(12)4+(12)4][(12)21]+(1)4(1)4=4(18)(12)+0=14

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