Find the sign of the : `cos (-2000^@)`

Find the sign of the : cos ec (-3020^(@))

Find the sign of the : tan2500^(@)

FInd the sign of sec 2000^(@)

Find the sign of the values of tan113^(0)-cos107^(0)=a and tan107^(0)-cos105^(@)=b

Find the sign of sin theta+cos theta for theta=140^(@)

Find the sign of the expression sin theta+cos theta when theta=100^(@)

Displacement-time graph of a particle moving in a straight line is as shown in figure. (a) Find the sign of velocity in regions oa,ab, bc and cd. (b) Find the sign of acceleration in the above region.

If theta = 5pi/9 the sign of the expression cos theta + sin theta is____.

x+(1)/(x)=1 then find the value of x^(2000)+(1)/(x^(2000))