please tell should I solve cengage any book like trigonometry or algebra portion of it individually to make my concept stronger if I am in class 12 and wanted to make the portion of mine class 11 stronger for jee mains and advanced ?
To ace JEE Mains and Advance which includes the syllabus of class 11 and 12 Physics,Chemistry and Mathematics, you need to make sure your NCERT Concepts are clear. To strengthen your weaker areas, you can refer to reference books and Cengage is a good publication to practice with. For trignometry, SL Loney is also good and for Algebra Dr SK Goyal Arihant Publication is good.
For detailed information about the important books of JEE Mains follow the link given below:
https://engineering.careers360.com/articles/best-books-for-jee-main
Hope this helps.
Good luck.
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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!
how many days required to complete mechanics, Modern physics, Physical chemistry, organic chemistry, inorganic chemistry, algebra, calculus, trigonometry, 2d and 3d geometry??
Please mention thr name of the examination for which you are enquiring. Now, the days required to complete the syllabus you mentioned, depends on you. Every person has a different ability and way to do things. If you are really dedicated and hardworking, you can complete the syllabus within 10-15 days, else, it may take as much time as you procrastinate. Firstly fix a timetable and follow it strictly knowing the topics you find tough and easy. Give more time to tough topics and solve question banks and previous year question papers to get an idea of the exam and the type of questions asked. This will help you cover up the syllabus well and soon.
Hope this helps.
Good luck !
In triangleABC and triangle XYZ, if angleA and angleX are acute angles such that cosA=cosX then show that angleA=angleX.
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!
guyz i m in 12th (2020-21) and i m weak in trigonometry... what i should do... as it is known that trigonometry is very important in 12th also.... give me some tips and how i can improve it... i dont know trigonometric equations... otherwise basics are good and tell me what formulas i should learn
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.
if a=cos2 and b=sin 7 ,then
a)a>0,b >0
b)ab<0
c)a>b
d)a
The correct option is (c) ab <0 dear.
Explanation is provided below :-
cos2<0 as we know cos(pi/2)=0 and (pi/2)is somewhere around 1.57
so it lies in the second quadrant (where values lie for 1 to 4.71).
In second quadrant, cos value is negative .
sin7>0 as we know sin(pi/2)=1 and (pi)is somewhere around 6.28
so after one complete rotation it lies in the first quadrant (where values lie for 0 to 1.57) .
In first quadrant, sin value is positive.
so, ab<0 ,as a negative number multiplied by a positive number gives negative number .
Thankyou
trigonometry transformation formulas
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.
how to be better in mathematics? specially in trigonometry.
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
solve the triangle in a=72cm angle b=108 degree angle c=25degree
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:
- Draw a line segment BC = 72 cm.
- Since 108 degree angle cannot be made using compass, use a protractor to make angle 108 degrees at B.
- At C, make an angle of 25 degrees using a protractor.
- Let the both rays made in steps 2 and 3 intersect at point A.
Hope this helps.
Thanks.
what are the best books to learn trigonometry?
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.
