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12.An arc BC subtends an angle of 144° at the centre O if a circle of radius 10 cm . Then the
length of arc BC is
A.25/2π B.25/2 π C.8/π D.π/8 E. 8π

13.If sin⁡〖20°=x 〗then cos⁡〖70°〗is
A.x B.x^2-1 C. 1-x D.1 +x E. √(1-x^2 )
14.If sin θ= 1/3 and θ is acute, then cos θ=……….
A.√3/2 B.1/2 C.√2/3 D.√8/3 E.2/√3

1. In the given figure ⨀ O , OP = 3 cm and AB = √27cm. Then the length of the arc AB is
   A. 3π cm B. 2π cm C. πcm D. 2π/3 cm E.π/3 cm

In the figure, x=………
A. 3 B. 4 C. 5
D. 6 E. 7

1. In the figure, x=………
   A. 10 B.11 C. 12
   D. 18 E. None of these

1. In the figure, x=………