5 cos²60° + 4 sec²30° - tan²45°
sin30° + cos230°
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Answer:
5 cos²60 + 4 sec²30 - tan²45 ÷ sin²30 + cos²30
==> 5(1/2)² + 4(2/√3)²-(1)² ÷ 1
==> 5/4 + 4(4/3) - 1 / 1
==> 5/4 + 16/3 - 1
==> 15+64-12/12
==> 3+64/12
==> 67/12
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