In ?PQR. ?PQR is a right angle. |QR| = 2cm and ?PRQ = 60o. Find |PR|

When an aeroplane is 800m above the ground, its angle of elevation from a point P on the ground is 30o. How far is the plane from P by line of sight?

Find the root of the equation 2x\(^2\) - 3x - 2 = 0

If log\(_{10}\) a = 4; what is a?

Simplify 0.63954 ÷ 0.003 giving your answer correct to two significant figures

If log\(_{10}\) q = 2.7078, what is q?

A student measured the length of a room and obtained the measurement of 3.99m. If the percentage error of is measurement was 5% and his own measurement was s...

What value of k makes the given expression a perfect square ? m\(^2\) - 8m + k = 0

Cos x is negative and sin x is negative.Which of the following is true of x?