Right-triangle trigonometry: sine, cosine and tangent

Use this for “A 7.5 m ladder leans at 38° to the ground. How high up the wall does it reach?”

Use this for “A ramp rises 1.5 m over a run of 6 m. What angle does it make with the ground?”

Use this for “Standing 36 m from a tree, you look up 28° to its top. How tall is the tree?”

Use this for “sin 28° is about 0.4695. Which cosine is equal to it?”