Hi Candidate,

The Question you have asked about the value of Sigma varies from 1 to n sin theta is incomplete and incorrect.

I would rather advise you to recheck your question and post it again, with the correct information and values making it meaningful and solvable.

Have a Good Day. Best of luck.

Hope that this answer helps you!!

Hi aspirant ,

Trigonometric functions  can be expanded in power series , which facilitates approximations of the functions in extreme cases. The angle x must be in radians.

Hope this help you

best of luck

Hi student,

I am not able to understand what you are actually asking.

I an see tag that your question is about trigonometry or is a numerical of trigonometry.

Please ask your full and clear question in the Comments section and I will be happy to help you out.

Good Luck!

Hey!

This is the solution:

We know that,

cosA= AB/ AC

cosX= XY/ XZ

Now, it is given that cosA= cosX

Therefore, AB/AC= XY/XZ

Let, these fractions be equal to k.

Therefore, AB= k.XY and AC= k.XZ ........(1)

Now, we need to find BC/ZY

So, BC/ZY= sqrt[AC^2- AB^2]/ sqrt[XZ^2- XY^2]

Putting the values from equation (1),

BC/ZY= k

Therefore, AB/XY= AC/XZ= BC/ZY

Therefore, the two triangles are similar.

And by property of similarity, angleA= angleX.

Hope this answer helps!

Hello,

In my opinion, trigonometry is easy to learn if you focus and try to understand why and what you do when some situation arises.

Firstly, you need to write all the related formulas in one page. All formulas ranging including sin2x, sin3x, tan2x, etc. etc. Then try to memorize them.

Now solve the NCERT book. Remember, when you solve, try to find reason for everything.

For example, if you are writing cos2x as 1-2sin^2x and not like 2cos^2x-1, then find the reason. It is probably because the denominator of the fraction is in terms of sinx. This will let both the terms cancel and make the problem simpler.

All the formulas mentioned in Class 11 and 12 NCERT must be prepared.

Hope this helps.

Thanks.

Hello,

There are 8 Trigonometric Transformation Formulas. The beauty of these formulas is that addition of two trigonometric ratios can be converted into multiplication and vice versa. This will help to cancel terms from numerator and denominator or will let you split the numerator into two different fractions.

By replacing A+B as C and A-B as D, we can rewrite the formulas in another fashion:

Hope this helps.

Thanks.