(1)化简:根号2sin(π/4-x)+根号6cos(π/4-x)(2)sin(67°-x)cos(x-22°)+cos(67°-x)cos(112°-x)的值为
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(1)化简:根号2sin(π/4-x)+根号6cos(π/4-x)(2)sin(67°-x)cos(x-22°)+cos(67°-x)cos(112°-x)的值为(1)化简:根号2sin(π/4-x)
(1)化简:根号2sin(π/4-x)+根号6cos(π/4-x)(2)sin(67°-x)cos(x-22°)+cos(67°-x)cos(112°-x)的值为
(1)化简:根号2sin(π/4-x)+根号6cos(π/4-x)
(2)sin(67°-x)cos(x-22°)+cos(67°-x)cos(112°-x)的值为
(1)化简:根号2sin(π/4-x)+根号6cos(π/4-x)(2)sin(67°-x)cos(x-22°)+cos(67°-x)cos(112°-x)的值为
(1)化简:根号2sin(π/4-x)+根号6cos(π/4-x)
=2(根号2)[(1/2)sin(π/4-x)+(根号3)/2 *cos(π/4-x)]
=2(根号2)[sin(π/4-x)cos(π/3)+cos(π/4-x)sin(π/3)]
=2(根号2)sin[(π/4-x)+π/3]
=2(根号2)sin(7π/12 -x)
(2)sin(67°-x)cos(x-22°)+cos(67°-x)cos(112°-x)
=sin(67°-x)cos(x-22°)+cos(67°-x)cos[90°-(x-22°)]
=sin(67°-x)cos(x-22°) + cos(67°-x)sin(x-22°)
=sin[67°-x)+(x-22°)]
=sin45°
=(根号2)/2
化简2sin^2[(π/4)+x]+根号3(sin^x-cos^x)-1
根号2sin(x+π/4)化简
化简sin(2x+π/3)-(根号3)sin²x+sinxcosx+(根号3)/2
化简sin(x+π/2)分之1+根号二cos(2x-π/4)
(1)化简:根号2sin(π/4-x)+根号6cos(π/4-x)(2)sin(67°-x)cos(x-22°)+cos(67°-x)cos(112°-x)的值为
sin根号下(x+1)-sin根号下x
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