100°
120°
30°
60°
Correct answer is B
Cos θ° = t2 + t2 -(√3t)2
= 2t2 - 3t2
= -t2/2t2
= -1/2
Thus θ = cos-1 (-0.5) = 120°
Solve the following quadratic inequality: x2−x - 4 ≤ 2...
An equilateral triangle of side √3cm is inscribed in a circle. Find the radius of the circle. ...
If y = 3 cos 4x, dy/dx equals? ...
An arc subtends an angle of 30<sup>o</sup> at the centre of a circle radius 12cm. Calcul...
From a point P, R is 5km due west and 12km due south. Find the distance between P and R...