cos θ = 13/85, tan θ = 84/13, sec θ = 85/13, csc θ = 85/84
Step-by-step explanation:
θ in 1st quadrant, all the coordinates are positive
sin θ = 84/85 (for the right angle triangle ABC, A is the right angle and a the hypotenuse, b and c are legs. )
a = 85
b = 84
c = √85² - 84² = 13
cos θ = 13/85, tan θ = 84/13, sec θ = 85/13, csc θ = 85/84
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