Angles and Trig

A horse is tied to a post by a rope. If the horse moves along a circular path, always keeping the rope tight and describes 88 meters when it traces the angle of 72o at the centre, then the length of the rope is

• 70m

• 55m

• 40m

• 35m

If the angles of a triangle are in the ratio 1:2:3, then the smallest angle in radian is

The value of tan1°.tan2°tan3°..... tan89° is equal to

• -1

• 1

The value of the expression cos1°.,cos2°. cos3°. ........ cos179° =

• -1

• 0

• 1

$\sin\left(\frac{\pi}{3}\right)$

$\sin\left(\frac{\pi}{4}\right)$

$\tan\left(30\degree\right)$

• undefined

$\cos\left(\frac{\pi}{6}\right)$

$\cos\left(\frac{\pi}{4}\right)$

$\cos\left(\frac{\pi}{3}\right)$