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Question

Question: \(\frac{\text{cosech}x}{\sqrt{\text{cosec}\text{h}^{2}x + 1}}\) equals....

cosechxcosech2x+1\frac{\text{cosech}x}{\sqrt{\text{cosec}\text{h}^{2}x + 1}} equals.

A

tanhx\tanh x

B

cothx\coth x

C

sechx\sec ⥂ hx

D

coshx{\cos h}x

Answer

sechx\sec ⥂ hx

Explanation

Solution

cosechxcosech2x+1=cosechxcoth2x=cosech xcothx\frac{\text{cosech}x}{\sqrt{\text{cosec}\text{h}^{2}x + 1}} = \frac{\text{cosech}x}{\sqrt{{\cot h}^{2}x}} = \frac{\text{cosech }x}{{\cot h}x}

=1sinhxcoshxsinhx=sech x= \frac{\frac{1}{{\sin h}x}}{\frac{{\cos h}x}{{\sin h}x}} = \text{sech }x.