Find the exact value of the expression. Do not use a calculator.
-$\sin 135 ^ { \circ } - \sin 270 ^ { \circ }$
A) $\frac { \sqrt { 2 } - 2 } { 2 }$
B) 2
C) $\frac { \sqrt { 2 } + 2 } { 2 }$
D) $\frac { \sqrt { 2 } } { 2 }$

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The Answer of Find the exact value of the expression. Do not use a calculator.
-$\sin 135 ^ { \circ } - \sin 270 ^ { \circ }$
A) $\frac { \sqrt { 2 } - 2 } { 2 }$
B) 2
C) $\frac { \sqrt { 2 } + 2 } { 2 }$
D) $\frac { \sqrt { 2 } } { 2 }$

Find the Exact Value of the Expression sin⁡135∘−sin⁡270∘\sin 135 ^ { \circ } - \sin 270 ^ { \circ }sin135∘−sin270∘

Find the Exact Value of the Expression $\sin 135 ^ { \circ } - \sin 270 ^ { \circ }$