Mathematics for IGCSE & O level - Pythagoras' Theorem And Trigonometry (Section 1 - No. 28)
If a field is in the shape of a quadrilateral with sides of 80m and 60m, a vertical post (CT) is located in one corner of the field. What steps are needed to find the height of the post?
Use Pythagoras Theorem
Use trigonometric function and find the angle of elevation
Apply the sine rule.
Apply the cosine rule.
Paliwanag
To find the height of the post (CT), the angle of elevation is needed to be found first.