if sinA=root3/2 find the value of 2cotsquareA-1
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Sin A =root3/2
Sin A = Sin 60° (Sin 60°=root3/2)
So,A=60°
Hence 2cot^2A-1=2*(1/root3)^2-1
=2*1/3-1
= -1/3
Sin A = Sin 60° (Sin 60°=root3/2)
So,A=60°
Hence 2cot^2A-1=2*(1/root3)^2-1
=2*1/3-1
= -1/3
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