how to remember allied angles formulas


Hello friends, I am Anil Kore welcome to my blog mathstips4u.

In this post I am going to tell you some tricks to remember trigonometric ratios of allied angles.
These formulas are most confusing and difficult to memorize. Students usually skip these formulas. After watching this video till ends you need not to skip these formulas. I will give you an easiest trick to remember these formulas. So let’s begin.
Allied angles are
Allied angles formulae
Now fallow 2 steps

Step 1. Remember
Allied angles formulas




Allied angles formulas

 The sign of trigonometric ratios is determined the quadrant in which the allied angle lies.
For that we have to remember All Silver Tea Cups
It means that in 1st quadrant all TR are positive.
In 2nd quadrant only sin and hence cosine are positive.
In 3rd quadrant tan and cot are positive.
In 4th quadrant cos and sec are positive. All other TRs are negative. 

In this we have seen how the difficult formulas can easily be remembered.




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