C-09-Q106: If $\cos A + \sin A = \sqrt{2}\cos A$, then $\cos A - \sin A = ?$

C-09-Q106: If $\cos A + \sin A = \sqrt{2}\cos A$, then $\cos A - \sin A = ?$ | প্রশ্ন করি

A

\sqrt{2}\cos A

If cos⁡A+sin⁡A=2cos⁡A\cos A + \sin A = \sqrt{2}\cos AcosA+sinA=2​cosA, then cos⁡A−sin⁡A=?\cos A - \sin A = ?cosA−sinA=?