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[" 12.यदि "B+C=60^(@)" ,सिद्ध कीजिए कि -...

[" 12.यदि "B+C=60^(@)" ,सिद्ध कीजिए कि - "],[sin(120^(@)-B)=sin(120^(@)-C)]

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If B+C=60^(@) then show that : sin(120^(@)-B)=sin(120^(@)-C)

If B + C = 60^@ , show that : sin (120^@- B) = sin (120^@ -C) .

Time period of sin x sin(120^(@)-x)sin(120^(@)+x)=

sin theta+sin(120^(@)+theta)-sin(120^(@)-theta

The period of sin x sin(120^(@) + x) sin(120^(@) -x) is

सिद्ध कीजिए कि 2tan^(-1)sqrt((b)/(a))=cos^(-1)((a-b)/(a+b))

If theta + phi = 60^(@) , show that, sin (120^(@) - theta) = cos (30^(@) - phi) .

sin30^(@)+sin60^(@)+sin90^(@)+sin120^(@)

( cos (45^(@) + A) - cos (45^(@) - A))/( sin (120^(@) + A)-sin(120^@-A))=

sin240^@+sin120^@ = ……………