Astack of telephone poles has 30 in the bottom row, 29 in the next, and so on, with one pole in the top row. how many poles are in the stack?

If sin θ=24/25 and 0 less than or equal to θ less than or equal to π/2, find the exact value of tan 2θ. answers; a) -527/336 b) -336/527 c)7/24 d) 24/7

Find the solutions for a triangle with a =16, c =12, and b = 63º

Geometry in the diagram, ∠abc is a right angle. ∠dbc = 30°27'40". find the measure of ∠abd.