trigonometry

Question: Answer: Let tan q = t then we have The above equation is a quadratic in t if t 1 = tan a , t 2 = tan b are the roots of the equation. Then ..

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Question: If A+B=45, prove that (1 + tan A) (1 + tan B) = 2. Answer: ..

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Question: Answer: By data: By componendo and dividendo ..

At a point 50 m from the foot of a building, the angle of elevation of the top of the building is 70 o 36 ' . Find the height of the building. BC is the building. A is the observer. AC is its distance of the building from the observer. is the angle of elevation. BC = 50 x tan 70 o 3..

The angle elevation and the angle of depressions are the angles which the line of sight makes with the horizontal. The angle of elevation of A as observed from C equals the angle of depression of C as observed from A..

The height of a building or the width of a river can be measured without climbing or crossing it. In this chapter we will show how it is made possible. Some suitable angles and distances will be measured to achieve the above result..