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Trigonometry

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59 Views

how to be better in mathematics? specially in trigonometry.

Nikhitha Sai 21st Mar, 2020

Hello. To perform better in mathematics, here are the few tips

1. Practice daily. Whichever sum you take, practice till the end till you reach the result, whether result might be right or wrong, solve till the end

2. After you get perfection with solving the sums and getting right answer, solve sums with in time limit. Have a time limit and solve the problem

3. Spare an hour or two minimum per day. Make it as a part of day

In trigonometry especially, first have a note of all the formulae, they are very important.

Solve as many sums as you can, it gets improved eventually

Here is a good reference book for practice

Trigonometry Advanced Placement Version Sixth Edition, 2001st Edition I.M. Gelfand, Mark Saul


264 Views

solve the triangle in a=72cm angle b=108 degree angle c=25degree

Sai Sri Nandan Ch 4th Apr, 2020

Hello,

You have not mentioned what must be solved/obtained in the question.

In my opinion, this question is related to Construction of Triangle.

Below are the construction steps to construct this triangle:

  1. Draw a line segment BC = 72 cm.
  2. Since 108 degree angle cannot be made using compass, use a protractor to make angle 108 degrees at B.
  3. At C, make an angle of 25 degrees using a protractor.
  4. Let the both rays made in steps 2 and 3 intersect at point A.

Hope this helps.

Thanks.

53 Views

what are the best books to learn trigonometry?

niharika cherry 20th Jan, 2020

Hello aspirant, some of the best books to learn trigonometry are-

  • Trigonometry (9th Edition) by Lial, Margaret; Hornsby, John; Schneider, David I.
  • Trigonometry - 4th edition by Mark Dugopolski
  • Trigonometry Advanced Placement Version Sixth Edition:Trigonometry 2001st Edition: Trigonometry: I.M. Gelfand, Mark Saul

Thank you.

160 Views

Prove that- (1+sec2A )(1+sec4A)=cotA

sudheer kumar 12th Jan, 2020

Dear Aspirant,

I have check the question it is misprint but I have tried to prove the Result hope this will help you.

here is the your answer:

recall your half-angle formula:

tan(x/2) = sinx/(1+cosx)

Now, we have

1+sec2A = (1+cos2A)/cos2A
= 1/[cos2A/(1+cos2A)]
= 1/[sin2A/(1+cos2A) * cos2A/sin2A]
= 1/(tanA cot2A)
= tan2A/tanA ---------------- (1)
Now we can see that
1+sec4A = tan4A/tan2A--------------------(2)

now we multiply eq.1 and 2, we get

(1+sec2A)(1+sec4A) = cot A*tanA




31 Views

can you prefer me how can i prepare for any competitive exams like mains and more on

Janakiram Sharma 21st Dec, 2019

Hello!

Mains,Adv and other engineering entrance examinations are considered as one of the toughest examinations in our country. Moreover, these examinations will land you into one of the finest and premier Institutions of India. Hence, having a proper plan and following it perfectly will surely help you out in cracking these examinations. First of all, try to concentrate on concept learning. Being thorough with the concepts will help you out in solving conceptual questions easily and hence, improves your chance of getting selected. Then, try to give as many sample papers as you can. Go through the previous years question papers and solve each and every problem thoroughly. This will improve your accuracy as well as efficiency. Finally, stay confident and determined. Work smart and reach your goal.

Hope this Helps.

148 Views

find the sum of the infinite series 1+cos4@/4! +cos8@/8! +.......

Sonali Sahu Student Expert 20th Dec, 2019

hello,

This question will get solved by applying rules and derivation. and you have to understand why it has happened like this. For that go to your maths teacher and ask him/her to help you out and explain you the steps he uses to solve it.

Some questions are important to understand as they might be get needed in understanding further concepts,answer questions and perform well with confidence.

Hope it helps!

193 Views

inverese trigonometry function imp

Avishek Dutta 23rd Dec, 2019

Specifically, they are the inverses of the sine , cosine, tangent , cotangent, secant, and cosecant functions , and are used to obtain an angle from any of the angle's trigonometric ratios. Inverse trigonometric functions are widely used in engineering, navigation, physics, and geometry.

Integrating the derivative and fixing the value at one point gives an expression for the inverse trigonometric function as a definite integral.

84 Views

trigonometry and trigonometric equation asked in jee mains and advance

KISHORE LOHRA 5th Dec, 2019
Dear Abhishek,

In JEE mains only trigonomertical equation are generally asked which is an application of trigonometry that we have studied earlier in 9th class or 10 class.
63 Views

inter ka questions answered chahiye

Payal 4th Dec, 2019

Hii aspirants

let me clear your doubt.

There are vairous sites available online from where you can get previous year question paper of class 11 and 12 along with their answers also there are sites from which you can download ncert solutions. There are vairous apps also available for preparationof class 11 and12 and there wyou will get all the notes, question paper. etc.

I hope my answer will help you out

Good luck

127 Views

may I know whats the chapterwise weightage for algebra and trigonometry for jee mains ??

Prashant Singh 24th Nov, 2019

Hello Danvarsha,

I hope you are doing good.

Preparing for JEE Mains, algebra and trigonometry are very important as they have a high weight age of marks in the exam.

Algebra - 35 Marks

Trigonometry - 7 Marks

Chapterwise Weightage in Algebra -

Complex Numbers & Quadratic Equations - 7 Marks

Permutations & Combinations - 3 Marks

Progressions & Series and Binomial Theorem - 9 Marks

Mathematical Reasoning & Induction - 3 Marks

Statistics - 3 Marks

Probability - 3 Marks

Matrices and determinants - 7 Marks


Chapterwise Weightage of Trigonometry -

Trigonometric Identities - 6 Marks

Solutions of Triangles & Heights and Distance - 1 Marks

I hope this information will help you. Good luck in the future!

Regards

Prashant Singh

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