inv-trig

Question: If ${{\sin }^{-1}}x=\theta +\beta $and ${{\sin }^{-1}}y=\theta -\beta ,$then $1+xy=$

1) ${{\sin }^{2}}\theta +{{\sin }^{2}}\beta $

2) ${{\sin }^{2}}\theta +{{\cos }^{2}}\beta $

3) ${{\cos }^{2}}\theta +{{\cos }^{2}}\beta $

4) ${{\cos }^{2}}\theta +{{\sin }^{2}}\beta $

Solution:

Explanation: No Explanation

Inverse trigonometric functions

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