cos 15x = sin 5x, for what values of x ?

Dear Student,

Please find below the solution to the asked query :


    cos 15 x = sin 5xcos 15x = cosπ2 - 5x15x = 2±π2 - 5x15x = 2 + π2 - 5x  or  15x = 2-π2+5x20x = 2+π2   or   10x = 2 - π2x = 10+π40  or   x = 5 - π20   ; nI

Hope this would clear your doubt.

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