Question

5 tan2 45° + 3 cot2 30° - 6 sec2 60°​

Answer 1

Answer:

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5 x 1² + 3 x (√3 )² - 6 x 2²

5 + 9 - 24

14 - 24

- 10

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Answer 2

Answer:

$5 { \tan }^{2} 45 + 3 { \cot}^{2} 30 - 6 { \sec}^{2} 60$

$tan \: 45 = 1 \\ cot \: 30 = \sqrt{3} \\ sec \: 60 = 2$

$= 5( {1}^{2} ) + 3( { \sqrt{3}) }^{2} - 6( {2}^{2} ) \\ = = > 5 +( 3 \times 3) - (6 \times 4) \\ = = > 5 + 9 - 24 \\ = = > 14 - 24 \\ = - 10$

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