একটি কৃষ্ণবস্তুর তাপমাত্রা $27 ° C$ থেকে $327 °$ এ বৃদ্ধি পায় তবে তাপ বিকিরনের বৃদ্ধি কত হবে?

Created: 9 months ago | Updated: 3 months ago

10 গুণ

16 গুণ

\frac{327}{27}

গুণ

20 গুণ

420

ABC ত্রিভুজের ক্ষেত্রে $a^{4} + b^{4} + c^{4} = 2 c^{2} (a^{2} + b^{2})$ হলে cos C এর মান হবে

Created: 3 months ago | Updated: 1 month ago

\frac{1}{\sqrt{2}}

\pm \frac{1}{\sqrt{2}}

\pm \frac{\sqrt{3}}{2}

None

483

Created: 3 months ago | Updated: 1 month ago

(\frac{3.5}{6}, \frac{\sqrt{3}}{4}) o r (\frac{\sqrt{3}}{4}, \frac{3.5}{6})

(\frac{6}{3.5}, \frac{4}{\sqrt{3}}) o r (\frac{6}{3.5}, \frac{4}{\sqrt{3}})

(\frac{3.5}{4}, \frac{6}{4}) o r (\frac{6}{4}, \frac{3.5}{4})

(\frac{\sqrt{3}}{3.5}, \frac{2}{3}) o r (\frac{2}{3}, \frac{\sqrt{3}}{3.5})

493

Created: 9 months ago | Updated: 1 month ago

\frac{1}{14} [\begin{matrix} 6 & 4 \\ - 2 & 1 \end{matrix}]

\frac{1}{14} [\begin{matrix} - 6 & - 4 \\ 2 & 1 \end{matrix}]

\frac{1}{14} [\begin{matrix} 6 & 4 \\ - 2 & - 1 \end{matrix}]

\frac{1}{- 14} [\begin{matrix} - 6 & - 4 \\ 2 & 1 \end{matrix}]

None

335

Created: 9 months ago | Updated: 1 month ago

0 °

45 °

95 °

90 °

None

346

Created: 3 months ago | Updated: 1 month ago

1 M

4 m

\frac{22}{7} m

2 m

769