Trigonometry

Six Trigonometric Ratios (sin, cos, tan, cot, sec and cosec)
June 15, 2017  Author: Jashan
Trigonometric Ratios (sin, cos, tan, cot, sec and cosec)
These six trigonometric ratios form the base of trigonometry. So, learn them carefully. Lets suppose we have triangle ABC right angled at B. We have angle and in .
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How to find values of sin 15, sin 75, cos 15, cos 75, tan 15, tan 75, cot 15, cot 75, sec 15, sec 75, cosec 15 and cosec 75 degrees?
June 14, 2017  Author: Jashan
In one of the post we learnt values of sin, cos, tan, cot, cosec and sec for 0, 30, 45, 60 and 90 degrees. You can review the post here http://mathinstructor.net/2012/08/valuesoftrigonometricratiosfor0304560and90degrees/
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Applications of Trigonometry Heights and Distances ncert solutions Chapter 9 Exercise 9.1 Question 16
October 13, 2012  Author: Jashan
Applications of Trigonometry Heights and Distances Chapter 9 Exercise 9.1 Question 16
16. The angles of elevation of the top of a tower from two points at a distance of 4 m and 9 m from the base of the tower and in the same straight line with it are complimentary. Prove that the height of the tower is 6 m.
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