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Question

If in the given figure AD is perpendicular to BC, AC = 26 units, CD = 10 units, BC = 42 units, triangle DAC whose angle is x and angle B = y, then, find the value of 6/cos⁡x -5/cos⁡y +8 tany =?

A 16/9

B 25/4

C 15/7

D 13/4

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