In ΔPQR , ∠R=54° the perpendicular bisector of PQ at S meets QR at T. If ∠TPR =46°, then what value of (in degree) ∠PQR?

A dealer is selling an article at a discount of 5 % on the marked price. If the marked price is 12% above the cost price and the article was sold for ₹ 532 then the cost price is (in ₹)

The value of sec⁴ A (1 – sin⁴A) – 2tan²A is: 

if $$x=\sqrt {64}+\sqrt {121}-\sqrt {169}$$, the find the value of x²

5-[4-{3-(3-3-6)}] is equal to:

A right triangle with sides 5 cm, 12 cm and   13 cm is rotated about the side 12 cm to from a cone. The volume of the cone so formed is :

If 551 ÷ 29 = 19 then 5.51 ÷ 0.0019 = ?

ΔABC is an equilateral triangle in which D, E and F are the points on sides BC, AC and AB, respectively, such that AD ⊥ BC, BE ⊥ AC and CF ⊥ AB. Which of the following is true?