1.

103πProve that cos2 x + cos2x+32.+ COS1X3​

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that ─━─━─━─━─━─━─━─━─━─━─━─━──━─━─━─━─━─━─━─━─━─━─━─━─☆Identity USED :- ─━─━─━─━─━─━─━─━─━─━─━─━──━─━─━─━─━─━─━─━─━─━─━─━─☆Consider ─━─━─━─━─━─━─━─━─━─━─━─━─☆Consider─━─━─━─━─━─━─━─━─━─━─━─━─☆Cosider LHS ☆ On substituting, the VALUES from EQUATION (1) and (2), we get─━─━─━─━─━─━─━─━─━─━─━─━─



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