Hey there! We receieved your request
Stay Tuned as we are going to contact you within 1 Hour
One of our academic counsellors will contact you within 1 working day.
Click to Chat
1800-5470-145
+91 7353221155
Use Coupon: CART20 and get 20% off on all online Study Material
Complete Your Registration (Step 2 of 2 )
Sit and relax as our customer representative will contact you within 1 business day
OTP to be sent to Change
Roots of the equation 2 sin^2(A) + sin^2(2A) = 2 are - (a) p/6 (b) p/4 (c) p/3 (d) p/2 where p is for pi...
hi
in these type of questions it is better to check from the options because there are only two terms 2 sin^2(A) + sin^2(2A) put A = PIE / 2 you will see that this value satisfies the equation.
and for subjective take the second term sin^2(2A) = 4 sin^2A * cos^2 A= 4 sin^2A (1-sin^2)...BY TRIGONOMETRIC IDENTITY
so the equation will become
4sin^2(A) - sin^4(A) + 2 sin^2 (A) = 2
put sin^2A = t you will get the quadratic equation
then solve it for sin (A) you will get the answer
We are here to help you in your IIT JEE preparation.
Now you can win by answering the questions on Discussion Forum. So help discuss any query on askiitians forum and become an Elite Expert League askiitian.
Now you score 5+15 POINTS by uploading your Pic and Downloading the Askiitians Toolbar : Click here to download the toolbar..
Thanks and Regards
Jitender
(askIITians expert)
2sin^2(A)+sin^2(2A)=2
2sin^2(A)+4sin^2(A)cos^2(A)=2
2sin^2(A)+4sin^2(A){1-sin^2(A)}=2
sin^2(A)+2sin^2(A){1-sin^2(A)=1
2sin^4(A)-3sin^2(A)+1=0
sin^2(A)=3/4+_(9-8)^1/2/4
sin^2(A)=1/2 or1
sin(A)=+_(1/2)^1/2 Or +_1
A=P/6 OrP/2
Get your questions answered by the expert for free
You will get reply from our expert in sometime.
We will notify you when Our expert answers your question. To View your Question
Win Gift vouchers upto Rs 500/-
Register Yourself for a FREE Demo Class by Top IITians & Medical Experts Today !