Given the identity \(cos2A\equiv1-2{sin}^{2}A\), show that\({sin}^{2}A=\frac{1}{2}(1-cos2A).\) - চর্চা

Given the identity \(cos2A\equiv1-2{sin}^{2}A\), show that\({sin}^{2}A=\frac{1}{2}(1-cos2A).\) - চর্চা