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Question

Evaluate the following :
sin230cos245+4tan230+12sin2902cos290+124cos20

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Solution

sin230cos245+4tan230+12sin2902cos290+124cos20

=(12)2(12)2+4(13)2+(12)(1)22(0)2+(124)(1)2

=18+43+12+124

=324+3224+1224+124

=4824

=2

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