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[" IPIEG obliou "18],[2cos^(-1)(4)/(5)=c...

[" IPIEG obliou "18],[2cos^(-1)(4)/(5)=cos^(-1)(7)/(25)(2017)]

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cot[cos^(-1)((7)/(25))]=

cos^(-1)((3)/(5))+cos^(-1)((4)/(5))=(pi)/(2)

cos(2cos^(-1)(7//25))=

cos (2cos ^ (- 1) ((7) / (25))) =

Find the value of "cos"^(-1)((-7)/(25))+"cos"^(-1)(3/(5)) .

Find the value of 2cos^(-1)(3)/(sqrt(13))+cot^(-1)(16)/(63)+(1)/(2)cos^(-1)(7)/(25)