If sin θ = 3 over 7 and tan θ < 0, what is the value of cos θ? negative square root of 10 negative 2 square root of 10 2 square root of 10 over 7 negative 2 square root of 10 over 7

The number of revolutions of two pulleys is inversely proportional to their diameters. if a 24-inch diameter pulley making 400 revolutions per minute is belted to an 8-inch diameter pulley, find the number of revolutions per minute of the smaller pulley.

If angle b measures 25°, what is the approximate perimeter of the triangle below? 10.3 units 11.8 units 22.1 units 25.2 units

Write each rational number in the form a/b, where a and b are integers. 1. 5 1/6 2. -12