Question

In Triangle LMN, < M is a right angle. If MN = 10 and LN = 20.4, determine m < N to the nearest degree.

Answer 1

cos θ = $\frac{adjacent}{hypotenuse}$

cos ∠N = $\frac{10}{20.4}$

      ∠N = cos⁻¹ $(\frac{10}{20.4})$

      ∠N = 60.65°

Answer: 61°