सिद्ध कीजिए की:
`( sin A +sin 2A) /( cos A - cos 2A)=cot ""(A)/(2)`

(sin A+sin2A)/(cos A-cos2A)=cot((A)/(2))

(sin 2x - sin 2y)/(cos 2y-cos 2x) = cot (x+y)

(sin A-sin B)/(cos B-cos A)=cot((A+B)/(2))

prove that (sin2A)/(1-cos2A)=cot A

Prove that ( sin 2 A )/( 1 - cos 2 A) = cot A

(cos A + sin A) ^ (2) + (cos A-sin A) ^ (2) = 2

Prove that ((cos A + cos B)/( sin A - sin B )) ^(n) + ((sin A + sin B )/( cos A - cos B )) ^(n) ={{:(2 cot ^(n) ((A- B)/(2)),"," "if n is even."),(0,",""if n is odd."):}.

( sin 4 A sin 3A - sin 5A sin 2A+ sin 7A sin 4A )/(cos 2A cos 3A - cos 2A * cos 7A + cos A * cos 10A )=

prove that: (sin2x-sin2y)/(cos2y-cos2x)=cot(x+y)

Prove the following identities : (sin A + cos A)/ (sin A - cos A) + (sin A - cos A)/ (sin A + cos A) = (2)/ (2 sin^(2) A - 1)