In the following question, some part of the sentence may have errors. Find out which part of the sentence has an error and select the appropriate option. If a sentence is free from error, select 'No Error'.
It seemed as if (1)/ every man in the (2)/ country was back them. (3)/No Error (4)

If Sec θ = 13/12, then Cot θ = ?

Δ XYZ is right angled at Y. If m∠Z = 60°, what is the length of YZ (in cm), if ZX = 3√3 cm?

What is the value of Sin 30° + 2 Cos 30° ?

D and E are points on side AB and AC of ΔABC. DE is parallel to BC. If AD:DB = 2:3 and area of ΔABC is 100 sq cm, what is the area (in sq cm) of quadrilateral BDEC?

ax + 3y = 6 has slope -2/3. What is the value of a?

The co-ordinates of the centroid of a triangle ABC are (-1 , 4). What are the co-ordinates of vertex C if co-ordinates of A and B are (-3 , -1) and (3 , 5) respectively?

What is the reflection of the point (5, -2) in the line y = -1?