Question

Write the value of cot² 45 - 1/sin² 45

Answer 1

Answer:

$- 1$

Step-by-step explanation:

$= > {cot}^{2} 45 \degree - \frac{1}{ {sin}^{2}45 \degree } \\ \\ = > {cot}^{2} 45 \degree - {csc}^{2} 45 \degree \\ \\ = > {(1)}^{2} - {( \sqrt{2}) }^{2} \\ \\ = > 1 - 2 \\ \\ = > - 1$