Question

If 3 sin theta +5 cos theta =4 then find 5 sin theta - 3 cos theta = ?

Answer 1

Hello !  Answer = –3√2  Trick : When (aSinx + bSinx) is given and (bSinx - aCosx) is asked then multiply the denominator by √a²+b² in given equation, both the sides.  (Solution in pic)  Thank you !