Pierre cut the length of an 8 cm wide plank into nine pieces and arranged them as shown in the picture. The centrepiece is a squ
are. How long was the original plank?
1 answer:
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As
cosec^1/2 (B)- cot^1/2(B)=1
so cosec^1/2(B)= 1+ cot^1/2 (B)