If Cot θ = 21/20, then what is the value of Cosec θ?

Δ DEF is right angled at E. If m∠F = 45°, then what is the value of 2 Sin F x Cot F?

What is the value of Cot 45° - (1/√3)Cosec 60°?

D and E are points on side AB and AC of ΔABC. DE is parallel to BC. If AD:DB = 2:5 and area of ΔABC is 98 cm sq, what is the area (in sq cm) of quadrilateral BDEC?

ax + 5y = 8 has slope of -4/3. 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 , -4) and (0 , 5) respectively?

What is the reflection of the point (-1 , 3) in the line x = -4?

What is the sum of the first 11 terms of an arithmetic progression if the 4th term is 11 and the 7th term is -4?