exam Maths Puzzle Numerical Ability

Find the exact value of: tan(-3π).

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exam Other Question

B-2 Construction In the channel, angle B=122.0 degrees, angle A= 27.0 degrees, and side BC=32.0 ft. Find the length of the slope AB. A trench is 180 feet long and 12 feet deep,7 feet wide at the top and 4 feet at the bottom.How many cubic yards of earth have been removed?