Jana is proving that the following trigonometric identity is true: cos(−θ)⋅tanθ=sinθ which step would be the first line of her proof? cos(−θ)⋅tanθ=sin(−θ) cosθ⋅tan(−θ)=sinθ cosθ⋅tanθ=sinθ cos(−θ)⋅tan(−θ)=sinθ

Find the value of tan theta if sin theta = 12/13 and theta is in quadrant 2

Solve for x and select the correct answer

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