13. Find the value of sin60° + tan²30° – cos 45º
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Step-by-step explanation:
sin60° + tan²30° – cos 45º = √3 / 2 + (1 / √3)² - 1
= √3 / 2 + 1/3 - 1
= √3 / 2 - 2/3
= (3 √3 - 4) / 6
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