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सिद्ध कीजिए, cos(30^(@)-A)-cos(30^(@)+A...

सिद्ध कीजिए, `cos(30^(@)-A)-cos(30^(@)+A)=sinA`

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Prove that: cos(30^(@)-x)-cos(30^(@)+x)=sinx

Prove that: cos(30^(@)-x)-cos(30^(@)+x)=sinx

cos30^(@) =___.

Prove that cos (30^(@) -A ) cos (30^(@) + A ) + cos (45^(@) - A) cos (45^(@) + A) = cos 2A + (1)/(4) .

Prove that: (cos(60^(@)-A)+sin(30^(@)-A))/(cos(30^(@)-A)-sin(60^(@)-A))= cotA

Prove that: (cos(60^(@)-A)+sin(30^(@)-A))/(cos(30^(@)-A)-sin(60^(@)-A))=cotA

Prove that: (cos(60^(@)-A)+sin(30^(@)-A))/(cos(30^(@)-A)-sin(60^(@)-A))= cotA

Prove that: (cos(60^(@)-A)+sin(30^(@)-A))/(cos(30^(@)-A)-sin(60^(@)-A))=cotA

cos^(2)30^@-sin^(2)30^@=cos60^@

cos 60^(@) sin 30^(@) +cos 30^(@) sin 60^(@)=