Question

Please simplify this question?(and explain briefly)​

⚙️ASAP

Answer 1

Answer:

- $\frac{\sqrt{6} }{3}$

Step-by-step explanation:

For any angle $\beta$ and any integer k :

sin $\beta$ = sin ( $\beta$ + 2k$\pi$ )  and  sin ( - $\beta$ ) = - sin $\beta$

cos $\beta$ = cos ( $\beta$ + 2k$\pi$ )  and  cos ( - $\beta$ ) = cos $\beta$  

tan $\beta$ = tan ( $\beta$ + k$\pi$ )  and  tan ( - $\beta$ ) = - tan $\beta$

cot $\beta$ = cot ( $\beta$ + k$\pi$ )  and  cot ( - $\beta$ ) = - cot ( $\beta$ )