14. Which is equivalent to $$ \sin (55) $$ ? a. $$ \cos (55) $$ b. $$ \cos (35) $$ c. $$ an (35) $$ d. $$ an (55) $$

Question

14. Which is equivalent to $$ \sin (55) $$ ? a. $$ \cos (55) $$ b. $$ \cos (35) $$ c. $$ 	an (35) $$ d. $$ 	an (55) $$

UpStudy AI · Accepted Answer

To determine which option is equivalent to $$ \sin(55^\circ) $$, let's use the co-function identity in trigonometry:

$$
\sin(\theta) = \cos(90^\circ - \theta)
$$

Applying this identity:

$$
\sin(55^\circ) = \cos(90^\circ - 55^\circ) = \cos(35^\circ)
$$

Thus, $$ \sin(55^\circ) $$ is equivalent to $$ \cos(35^\circ) $$.

**Answer:**  
**b. $$ \cos (35) $$**
$$ \sin(55^\circ) $$ is equivalent to $$ \cos(35^\circ) $$.

Which is equivalent to ?
a.
b.
c.
d.