Math, asked by singumanojsmanoj, 4 months ago

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Answered by mfb8525

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I hope you have done inverse trigonometry.

cos A = cos X

==> cos⁻¹ (cos A) = cos⁻¹ (cos X)

==> A = X ( we can cancel cos⁻¹ and cos because angles are acute and belongs to (0, pi] )

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