Use Sum and Difference Formulas for Cosines and Sines
-$\sin 255 ^ { \circ }$
A) $- \frac { \sqrt { 2 } ( \sqrt { 3 } + 1 ) } { 4 }$
B) $- \frac { \sqrt { 2 } ( \sqrt { 3 } - 1 ) } { 4 }$
C) $\frac { \sqrt { 2 } ( \sqrt { 3 } + 1 ) } { 4 }$
D) $\frac { \sqrt { 2 } ( \sqrt { 3 } - 1 ) } { 4 }$

Question

Quizplus · Accepted Answer

The Answer of Use Sum and Difference Formulas for Cosines and Sines
-$\sin 255 ^ { \circ }$
A) $- \frac { \sqrt { 2 } ( \sqrt { 3 } + 1 ) } { 4 }$
B) $- \frac { \sqrt { 2 } ( \sqrt { 3 } - 1 ) } { 4 }$
C) $\frac { \sqrt { 2 } ( \sqrt { 3 } + 1 ) } { 4 }$
D) $\frac { \sqrt { 2 } ( \sqrt { 3 } - 1 ) } { 4 }$

Use Sum and Difference Formulas for Cosines and Sines - sin⁡255∘\sin 255 ^ { \circ }sin255∘

Use Sum and Difference Formulas for Cosines and Sines
- $\sin 255 ^ { \circ }$