mate9235 mate9235

06-04-2024
Mathematics

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If cos⁻¹ [ (cos α + cos β)/(1 + cos α cos β] = 2 tan⁻¹ x then x = _____
a. tan α/2 tan β/2
b. tan α tan β
c. cot α/2 cot β/2
d. cot α cot β

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