Changes

===Learning objectives===

===Learning objectives===

===Notes for teachers===

===Notes for teachers===

Trigonometry is multi-concept based. A student should know concept of measuring-angles, triangle, right-angled triangle, pythogorus theorem, ratios, proportionality and Identities. Trigonometry also require students insight,visualization and perceptual ability.

Many teachers and students feel that Trigonometry is a difficult to understand subject. One reason for this is that Trigonometry is multi-concept based. A student should know following concepts well

#of measuring-angles, triangle and right-angled triangle,  

#pythogorus theorem,  

#ratios,  

#proportionality

#Identities.  

#Trigonometry also require students insight,visualization and perceptual ability.

===Activities===

===Activities===