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Question Number 174069 by alcohol last updated on 24/Jul/22

Commented by alcohol last updated on 24/Jul/22

$$pleasehelpme$$

Answered by aleks041103 last updated on 24/Jul/22

$$1.$$$$2arcsin\left(\sqrt{x}\right)-\frac{\pi }{2}=2t-\frac{\pi }{2}$$$$sin(2t-\pi /2)=-cos\left(2t\right)$$$$\Rightarrow -cos\left(2t\right)=2{sin}^{2}t-1=2{\left(\sqrt{x}\right)}^2-1=2x-1$$$$\Rightarrow Q.E.D$$

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