Use an identity to write the expression as a single trigonometric function or as a single number.
-$$2 \cos ^ { 2 } 75 ^ { \circ } - 1$$
A) $- \frac { 1 } { 2 }$

B) $\frac { 1 } { 2 }$

C) $\frac { \sqrt { 3 } } { 2 }$

D) $- \frac { \sqrt { 3 } } { 2 }$

Question

Use an identity to write the expression as a single trigonometric function or as a single number.
-$$2 \cos ^ { 2 } 75 ^ { \circ } - 1$$
A) $- \frac { 1 } { 2 }$

B) $\frac { 1 } { 2 }$

C) $\frac { \sqrt { 3 } } { 2 }$

D) $- \frac { \sqrt { 3 } } { 2 }$

Quizplus · Accepted Answer

The Answer of Use an identity to write the expression as a single trigonometric function or as a single number.
-$$2 \cos ^ { 2 } 75 ^ { \circ } - 1$$
A) $- \frac { 1 } { 2 }$

B) $\frac { 1 } { 2 }$

C) $\frac { \sqrt { 3 } } { 2 }$

D) $- \frac { \sqrt { 3 } } { 2 }$

Use an Identity to Write the Expression as a Single 2cos⁡275∘−12 \cos ^ { 2 } 75 ^ { \circ } - 12cos275∘−1

Use an Identity to Write the Expression as a Single $2 \cos ^ { 2 } 75 ^ { \circ } - 1$