5 cos2 60+ 4sec2 30-tan2 45/sin2 30+30
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Answer:
67/12
Step-by-step explanation:
5 cos2 60+ 4sec2 30-tan2 45/sin2 30+30
=5 x (1/2)square +( 4/root 3)square - 1 square whole divided by 1
=(implies cos square tita + sin square tita = 1 )'
=5/4+6/3-1
= 15+64-12/12
=67/12
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