Math, asked by krishna824sharma, 11 months ago

find the value of [sin²30+cos²30] [sec²45-tan²45] answer asap​

Answers

Answered by Anonymous
3

Step-by-step explanation:

[sin²30+cos²30] [sec²45-tan²45]

(1)( \frac{1  }{ { \cos(45) }^{2} }  -  \frac{ { \sin(45) }^{2} }{ { \cos(45) }^{2} } )  \\ (1) \frac{ { \cos(45) }^{2} }{  { \cos(45) }^{2}  }  \\ 1

Answered by Anonymous
2

Answer:-

= 1

Step - by - step explanation:-

Value used :-

  • sin 30 = 1/2
  • cos 30= √3/2
  • tan 45 = 1
  • sec 45 = √2

According to the question:-

 \red{ \bf{ </u><u>\</u><u>b</u><u>i</u><u>g</u><u>[</u><u>{sin}^{2} 30 +  {cos}^{2} 30</u><u>\</u><u>b</u><u>i</u><u>g</u><u>]</u><u> \:  </u><u>\</u><u>b</u><u>i</u><u>g</u><u>[</u><u>{sec}^{2} 45  -  {tan}^{2} 45}}</u><u>\</u><u>b</u><u>i</u><u>g</u><u>]</u><u> \\  \\ \bf{ replacing \: values \: are \: given \: above \: } \\  \\  \implies \:  </u><u>\</u><u>b</u><u>i</u><u>g</u><u>[</u><u>{ \bigg( \frac{1}{2} \bigg )}^{2}  +  { \bigg( \frac{ \sqrt{3} }{2}  \bigg)}^{2}</u><u>\</u><u>b</u><u>i</u><u>g</u><u>]</u><u> </u><u>\</u><u>b</u><u>i</u><u>g</u><u>[</u><u> \:  { (\sqrt{2}) }^{2}  - 1</u><u>\</u><u>b</u><u>i</u><u>g</u><u>]</u><u> \\  \\  \implies \:  </u><u>\</u><u>b</u><u>i</u><u>g</u><u>[</u><u>\frac{1}{4}  +  \frac{3}{4}</u><u>\</u><u>b</u><u>i</u><u>g</u><u>]</u><u> \: </u><u>\</u><u>b</u><u>i</u><u>g</u><u>[</u><u> 2 - </u><u>1</u><u>\</u><u>b</u><u>i</u><u>g</u><u>]</u><u> \\  \\  \implies \:  \frac{4}{4}  = 1

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