sin(45+theta)-cos(45-theta) . Find its value

1.	sin(45+theta)-cos(45-theta) . Find its value
Answer» {tex}\\begin{array}{l}\\sin(45+\\mathrm\\theta)-\\cos(45-\\mathrm\\theta)\\\\=\\sin(45+\\mathrm\\theta)-\\cos\\lbrack90-(45+\\mathrm\\theta)\\rbrack\\\\=\\sin(45+\\mathrm\\theta)-\\sin(45+\\mathrm\\theta)\\\\=0\\end{array}{/tex}

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