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(B) FalseWe know that $\sin(90^{\circ} - 	heta) = \cos 	heta$.Therefore,$\sin 67^{\circ} = \sin(90^{\circ} - 23^{\circ}) = \cos 23^{\circ}$.Substitu

Vedclass · Accepted Answer

False

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(B) FalseWe know that $\sin(90^{\circ} - 	heta) = \cos 	heta$.Therefore,$\sin 67^{\circ} = \sin(90^{\circ} - 23^{\circ}) = \cos 23^{\circ}$.Substituting this into the expression:$\cos^{2} 23^{\circ} - \sin^{2} 67^{\circ} = \cos^{2} 23^{\circ} - (\cos 23^{\circ})^{2}$$= \cos^{2} 23^{\circ} - \cos^{2} 23^{\circ}$$= 0$.Since $0$ is neither positive nor negative,the statement that the value is positive is False.

Write 'True' or 'False' and justify your answer.
The value of the expression $(\cos^{2} 23^{\circ} - \sin^{2} 67^{\circ})$ is positive.

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Write 'True' or 'False' and justify your answer.The value of the expression $(\cos^{2} 23^{\circ} - \sin^{2} 67^{\circ})$ is positive.