Surat

Shweta replied | 2 days ago

I believe that spoken English is directly related to grammar rules, for which I recommend Wren and Martin high school grammar and lot of practice by yourself. 

Jiya Tawar replied | 2 days ago

English File - oxford 

Ship or Sheep? – Ann Baker

Oxford Word Skills

Aiswarya Harikumar replied | 3 days ago

B) Accentuating the space between the main beats

Sadiq replied | 14 hrs ago

Fatima Khan Pathan replied | 5 days ago

For the ellipse

x²/16 + y²/9 = 1

Here, a = 4 and b = 3.

Area = πab = π × 4 × 3 = 12π square units ≈ 37.7 square units.

Mahinoor Banu replied | 3 days ago

• Center: $(0, 0)$

• Orientation: Horizontal major axis (along the x-axis, as $16 > 9$)

• Semi-Major Axis ($a$): $4$ (since $a^2 = 16$)

• Semi-Minor Axis ($b$): $3$ (since $b^2 = 9$)

• Focal Distance ($c$): $\sqrt{a^2 - b^2} = \sqrt{16 - 9} = \sqrt{7} \approx 2.65$

• Major Axis Vertices: $(\pm 4, 0)$

• Minor Axis Vertices (Co-vertices): $(0, \pm 3)$

• Foci: $(\pm\sqrt{7}, 0)$

• Length of Major Axis: $2a = 8$

• Length of Minor Axis: $2b = 6$

• Eccentricity ($e$): $\frac{c}{a} = \frac{\sqrt{7}}{4} \approx 0.661$

• Directrices: $x = \pm\frac{a^2}{c} = \pm\frac{16}{\sqrt{7}}$

• Length of Latus Rectum: $\frac{2b^2}{a} = \frac{2(9)}{4} = \frac{9}{2} = 4.5$