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Given sin28.4=.4756, cos28.4=.8796, and tan28.4=.5407 find the cos of 61.6

Grace is standing 18 feet from a lighthouse and kelly is standing 10 feet from grace. the angle that grace looks up to see the top of the lighthouse is 45°. the angle that kelly looks up to see the top of the lighthouse is y°. find the height, h, of the lighthouse. find the angle, rounded to the nearest tenth of a degree, in which kelly looks up to the top of the lighthouse. to the nearest tenth of a degree, find the value of x° . in two or more sentences, explain your calculations

Ofin . (2,4) (2,1) a. y= 2 b. x= 2 c. x= -2 d. y= 2x