Question

find the value of
sec²30-tan²60
​

Answer 1

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$= sec {}^{2} \: 30 {}^{0} - tan {}^{2} \: 60 {}^{0}$

$= ( \frac{1}{2} { ) }^{2} - ( \sqrt{3} {)}^{2}$

$= \frac{1}{4} - 3$

$= \frac{1 - 12}{4}$

$= \frac{ - 11}{4}$

Answer 2

Answer:-9/4

Step-by-step explanation:

1. sec30=root2/3 & tan60=root3
2. sec^2 30=2/9 and tan^2 60=3
3. sec^2 30-tan^ 60=2/9-3=-25/9