Line Of Sight: An Imaginary line drawn between the object and the eyes of the observer. The angle of elevation of the point viewed by the observer is made by the line of sight with above the horizontal level. note: In this situation, we always raise our heads to watch the object Angle Of…
What is the trigonometry ratios table? It is a type of table by this table we can find out the value of some specific angles like 0º,30º,45°,60°and 90º. So it is essential that you know how to make this table, here I am going to explain this table in a very easy manner here I…
Q 1. In ΔABC, right-angled at B, AB = 24cm, BC = 7cm. Determine: (i) sin A, cos A (ii) sin C, cos C Given: In ΔABC ∠B = 90° AB = 24 BC = 7 To Find: (i) sin A =? Cos A =? (ii) sin C =? Cos C =? Solution: By PGT…
Trigonometric identities are very important during solving Questions. Here are the following identities which are used to solve or prove the questions. I. sin2 θ + sin2 θ = 1 (a) sin2θ = 1 – cos2 θ (b) cos2θ = 1 – sin2θ II. 1 + tan2θ = sec2θ (a) tan2θ = sec2θ – 1…
We have already studied the triangle and also the types of a triangle in Previous classes. Here we will discuss a particular type of triangle i.e. right-angled triangle. Let us take some examples where we use a right-angled triangle: If you go to Delhi to visit the Qutub Minar so you can find out the…