Vikas TU
Last Activity: 8 Years ago
Minimum value of atan2x + cot2x = >
First convert them into sec and cosec.
= a(sec^2x – 1) + (cosec^2 – 1)
= a(1/cos^^2x – 1) + (1/sin^2x – 1)
= 1/sin^2x + a/cos^2x – 2
= 1/(1-cos^2x) + a/cos^2x – 2
Now here sin and cos values should be maximum for getting minmum values.
SO,
Min. value would be = > 1/(1-0) + a/1 – 2 => a – 1
Now maximum value of asin2y + bcos2y = > asin^2y +b – bsin^2y
=> b + [sin^2y]*(a – b)
=> b + a – b
=> a
