Question

Trigonometry Question ​

Answer 1

Use Pythagorean theorem to find BC
AB^2 + BC^2 = AC^2
6^2 + BC^2 = 10^2
36 + BC^2 = 100
BC^2 = 64
BC = 8

If AC = 10, CD and AD = 5
Tan = opp/adj
Tan = 5/8

Triangle BCD is a 45-45-90 triangle
CD = BD = 5
Sec = inverse cos
sec = hyp/adj
Sec = 8/5