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

Find the sign of the : cosec (-3020^@) .

Find the sign of the : tan 2500^@

FInd the sign of sec2000^@

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

Find the sign of the expression sin theta + cos theta when theta = 100^0

Find the sign of the slope and its nature.

If theta = - 400^(@) , determine then the sign of sin theta + cos theta

If theta=-1000^(@) , determine the sign of theta-cos theta .

Three negative integers and one positive integer are multiplied. Find the sign of the product.

The population of a city was 20,000 in the year 1997. It increased at the rate of 5% p.a. Find the population at the end of the year 2000.