Thank you for registering.

One of our academic counsellors will contact you within 1 working day.

Please check your email for login details.
MY CART (5)

Use Coupon: CART20 and get 20% off on all online Study Material

ITEM
DETAILS
MRP
DISCOUNT
FINAL PRICE
Total Price: Rs.

There are no items in this cart.
Continue Shopping

ans given in numerical for in my q ans is (-4, 3-root 21whole divided by 2 ) this bracket in close interval union open interval ( 1, infinity) as find p for which fn f(x) ( root under p+4/1-p - 1) x5-3x + ln5 decreases for all real x in this q, -1 is not part of root -1 is outside 2- find interval in which at least 1 of the pts of local maxm of (cosx)2+ sinx lies

ans given in numerical for in my q ans is (-4, 3-root 21whole divided by 2 ) this bracket in close interval union open interval ( 1, infinity) as
find p for which fn f(x) ( root under p+4/1-p - 1) x5-3x + ln5 decreases for all real x in this q, -1 is not part of root -1 is outside
2- find interval in which at least 1 of the pts of local maxm of (cosx)2+ sinx lies

Grade:12

1 Answers

Rinkoo Gupta
askIITians Faculty 80 Points
7 years ago
y=(cosx)2+sinx
dy/dx=2cosx(-sinx)+cosx
put dy/dx=0
-2sinxcosx+cosx=0
cosx[1-2sinnx]=0
=> either cosx=0 or 1-2sinx=0
=>x=pie/e or sinx=1/2
=>x=pie/2 or pie/6
d2y/dx2=-2cos2x-sinx
d2y/dx2 at xpie/2=-2cospie-sinpie/2=2-1
=1>0
so function is minima at x=pie/2
d2y/dx2 at pie/6=-2cospie/3-sinpie/6
=-3/2 <0
so function is maxima at pie/6
Thanks & Regards

Rinkoo Gupta

AskIITians Faculty

Think You Can Provide A Better Answer ?

Provide a better Answer & Earn Cool Goodies See our forum point policy

ASK QUESTION

Get your questions answered by the expert for free