Question

$\frac{cos \: x - sin \: x}{cos \: x + sin \: x} = \frac{1 - \sqrt{3} }{1 + \sqrt{3} }$
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Answer 1

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Answer:

answer in attachment....

Answer 2

Answer:

3(x

2

+7)

\longrightarrow (3 \times x^2 ) +(3 \times 7)⟶(3×x

2

)+(3×7)

\longrightarrow 3x^2 + 21⟶