MEDIUM
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How do you find sech-1x value?

Important Questions on Hyperbolic Functions

HARD
Let k>0 and t=sech-112-cosech-13k. If 3et=2+3, then k=
MEDIUM
The domain of the function fx=sec-13x-4+tanh-1x+35 is
MEDIUM
If for sinhx=3, the value of x obtained is in the form of loge(a+b), then find the value of a+b.
MEDIUM

Represent the union of two sets by Venn diagram for each of the following.

X={x | x is a prime number between 80 and 100}

Y={y | y is an odd number between 90 and 100}

HARD
If tan h-1x=alog1+x1-x,x<1, then a is equal to
HARD
If tanh-1x+iy=12tanh-12x1+x2+y2+i2tan-12y1-x2-y2, where x, yR, then tanh-1iy=