Question

Tan²45-sin²30+cos²60-sec²30

Answer 1

$\boxed{hlo}$

here is ur answer..

Tan 45° = 1
sin 30° = 1 / 2
cos 60° = 1 / 2
sec30° = 2/ √3

( 1 ) ² - ( 1/2)² + ( 1/2)²- ( 2/ √3)²

1 - 1 / 4 + 1 / 4 - 4 / 3

1 - 4 / 3

-1 / 3""""

also refer to attachment....

Answer 2

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

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

$\frac{4 - 1 + 3 - 16}{12}$

$- \frac{ 10}{12}$

$- \frac{5}{6}$

hope its help for you
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Radhe Radhe