The value of sin^{2} 30^{circ} - tan 45^{circ | vedclass

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Question

(A) Given expression: $\sin^{2} 30^{\circ} - 	an 45^{\circ} + \cos^{2} 60^{\circ} - \cot 90^{\circ}$Substitute the trigonometric values:$\sin 30^{\ci

Vedclass · Accepted Answer

$-\frac{1}{2}$

Vedclass · Answer

(A) Given expression: $\sin^{2} 30^{\circ} - 	an 45^{\circ} + \cos^{2} 60^{\circ} - \cot 90^{\circ}$Substitute the trigonometric values:$\sin 30^{\circ} = \frac{1}{2}$,$	an 45^{\circ} = 1$,$\cos 60^{\circ} = \frac{1}{2}$,and $\cot 90^{\circ} = 0$Substituting these values into the expression:$= (\frac{1}{2})^{2} - 1 + (\frac{1}{2})^{2} - 0$$= \frac{1}{4} - 1 + \frac{1}{4}$$= \frac{2}{4} - 1$$= \frac{1}{2} - 1$$= -\frac{1}{2}$

The value of $\sin^{2} 30^{\circ} - \tan 45^{\circ} + \cos^{2} 60^{\circ} - \cot 90^{\circ}$ is ........

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