Please help me with the questions I need

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Please help me with the questions I need

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Step-by-step explanation:tan x =opp/adjx = tan-¹(8/20)x =21.8 degree but you are asked to find the angle of elevation so angle of elevation + 21.8 + 90 = 180 degree .... basic rule of triangleangle of elevation=180-90-21.8angle of elevation=68.2 degree

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