(√ 2 sinx )-sin(x-π/4) 化简如题
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(√ 2 sinx )-sin(x-π/4) 化简如题
(√ 2 sinx )-sin(x-π/4) 化简
如题
(√ 2 sinx )-sin(x-π/4) 化简如题
原式=√2sinx-sinxcosπ/4+cosxsinπ/4
=√2sinx-sinx*√2/2+cosxsinπ/4
=sinx*√2/2+cosxsinπ/4
=sinxcos π/4+cosxsinπ/4
=sin(x+π/4)
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