IIT JEE-AIEEE 2012, Entrance Notifications, Study Tips, Engineering Preparation, Practice Test Papers, Experts Advice

Ask iit jee aieee pet cbse icse state board community

Discussion Response Post to: plzzzz help

Forum Index -> Differential Calculus -> View Full Question

Author

Message

sohraan (291)

Blazing goIITian

total posts: 372
Offline

SECOND ONE:

PUT X=TAN Q........WHERE THETA(Q) BELONGS TO( -PIE/2,PIE/2)...

U WILL GET ::::

FUNCTION SAY Y=Q^2+2COSQ...

THE ABOVE EXPRESSION MAXIMUM VALUE IS OBTAINED BY DIFFERNTIATING METHOD WHICH GIVES THETA =0(SINCE SINQ=Q AT ONLY THIS POINT)

WHICH WILL BE 2.

NEXT MINIMUM VALUE WILL

BE AT WHEN THETA=PIE/2.......

SO RANGE BECOMES(2,PIE^2/4)

CORRECT ME IF MY ANSWER OR METHOD IS RONG