Question

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Answer 1

Step-by-step explanation:

As we know the sum of 3 angles of the triangle is 180

Now, Here

A + B + C = 180

90 + x + x = 180

2x = 180 - 90

2x = 90

x = 90 / 2

x = 45 so B + C = 45 + 45 = 90

or we can solve like

A + ( B + C ) = 180

90 + ( x ) = 180

x = 180 - 90

x = 90

so the answer is not in the option so we can prefer Option C not define

hope it helps you mark as brainliest please

Answer 2

Step-by-step explanation:

$\bf \huge\: \: Question \: \:$

• Q,7 -if A+B+C =180 and Angle , A =90°,

Then What is value of tan (B+C)?

_____________________________

$\bf \huge\: \: Given \: \:$

• A+B+C =180
• Angle A =90°,

_____________________________

$\bf \huge\: \: To \:Find$

• What is value of tan (B+C)?

_____________________________

$\bf \huge\: \: Solving \:$

$\</u></strong><strong><u>t</u></strong><strong><u>t</u></strong><strong><u> </u></strong><strong><u> </u></strong><strong><u> </u></strong><strong><u> </u></strong><strong><u>Supposed</u></strong><strong><u> </u></strong><strong><u>.</u></strong><strong><u> </u></strong><strong><u> </u></strong><strong><u> </u></strong><strong><u>.</u></strong><strong><u>.</u></strong><strong><u>.</u></strong><strong><u>.</u></strong><strong><u>.</u></strong><strong><u>B</u></strong><strong><u> </u></strong><strong><u>+</u></strong><strong><u>C</u></strong><strong><u> </u></strong><strong><u>=</u></strong><strong><u> </u></strong><strong><u>X</u></strong><strong><u>$

Accourding To the Question:-

$\tt</u></strong><strong><u> </u></strong><strong><u> </u></strong><strong><u>A+B+C =180</u></strong><strong><u>$

Putting all values:-

$\tt 90°+x= 180$

$\tt X= 180-90$

$\tt</u></strong><strong><u> </u></strong><strong><u> </u></strong><strong><u>on</u></strong><strong><u>.</u></strong><strong><u>.</u></strong><strong><u>.</u></strong><strong><u>.</u></strong><strong><u> substraction</u></strong><strong><u>$

$\tt</u></strong><strong><u> </u></strong><strong><u> </u></strong><strong><u> </u></strong><strong><u> </u></strong><strong><u>X</u></strong><strong><u> </u></strong><strong><u>=</u></strong><strong><u> </u></strong><strong><u>9</u></strong><strong><u>0</u></strong><strong><u>°</u></strong><strong><u>$

Accourding to the Question :-

$\tt</u></strong><strong><u> </u></strong><strong><u> </u></strong><strong><u> </u></strong><strong><u> </u></strong><strong><u> </u></strong><strong><u>tan</u></strong><strong><u> (B+C)?</u></strong><strong><u>$

Putting the all values

$\tt</u></strong><strong><u> </u></strong><strong><u> </u></strong><strong><u> </u></strong><strong><u>Tan</u></strong><strong><u> </u></strong><strong><u>(</u></strong><strong><u>9</u></strong><strong><u>0</u></strong><strong><u>°</u></strong><strong><u>)</u></strong><strong><u>. </u></strong><strong><u>$

$\tt</u></strong><strong><u>. </u></strong><strong><u> </u></strong><strong><u> </u></strong><strong><u> </u></strong><strong><u>tan90°</u></strong><strong><u> </u></strong><strong><u>=</u></strong><strong><u> </u></strong><strong><u>Not</u></strong><strong><u> </u></strong><strong><u>.</u></strong><strong><u>.</u></strong><strong><u>.</u></strong><strong><u>.</u></strong><strong><u>define</u></strong><strong><u>$

So option c is right answer.