(iv) tan-1 (2 cos (2π/3) )

1.	(iv) tan-1 (2 cos (2π/3) )
Answer» <strong style="font-size:14px; line-height:20px !important;"> The value ofinverse tan ratios are (i) is π / 6, (ii) is - π / 6,(iii) is 0 and (iv) is- π / 4.</strong><p>To find the values of the above inverse trigonometric ratios, we will use <a href="https://www.cuemath.com/trigonometry/trigonometric-identities/">trigonometric identities</a>.</p>

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