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요Lei 효83(a) 6tan-1J3-cot-ih/3) "rm t (equals)(a) O7,(c)π(b) 2 |
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Answer» ⇒tan¯¹ √3 - cot-1(-√3)⇒π/3 - (π-π/3)⇒π/3 - 5π/6⇒ -3π/6⇒ -π/2 option b. |
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