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If secA=(17)/8\ a n d\ cos e c\ B=5/4 th...

If `secA=(17)/8\ a n d\ cos e c\ B=5/4` then `"sec"(A+B)` can have the value equal to- a.`(85)/(36)` b. `-(85)/(36)` c.`-(85)/(84)` d. `(85)/(84)`

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