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OpenStudy (anonymous):
use a graphing utility to solve the equation for θ , where 0 ≤ θ <2π cos θ= -√1-sin^2θ
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OpenStudy (shubhamsrg):
you have to solve for cos@ = -cos@ |dw:1341905286018:dw| clearly the solns are for which cos@ = 0 or @ = 2npi + pi/2 sorry for the weird drawing! :P
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