`sin2A`, `cos(2A)` & `tan(2A)` के सूत्र

sin ^ (2) A.cot ^ (2) A-cos ^ (2) A * tan ^ (2) A = 1

If A=30^(@), prove that sin2A=2sin A cos A=(2tan A)/(1+tan^(2)A)

Prove that (i) (sin^(2)A cos^(2)B - cos^(2)A sin^(2) B )=(sin^(2)A- sin^(2)B) (ii) (tan^(2)A sec^(2)B - sec^(2)A tan^(2)B)=(tan^(2)A- tan^(2)B)

Geometrical proOF OF double angle(sin2A,cos2A,tan2A) and question based on this

Prove :sin^(2)A cot^(2)A+cos^(2)A tan^(2)A=1

(1 + sin2A-cos2A) / (1 + sin2A + cos2A) = tan A

cos ^ (2) A-sin ^ (2) A = (1-tan ^ (2) A) / (1 + tan ^ (2) A)

(1 + sin2A) / (cos2A) = (cos A + sin A) / (cos A-sin A) = tan ((pi) / (4) +1)

Prove that (sin^(2)A)/(cos^(2)A)+1=(tan^(2)A)/(sin^(2)A)

(sin ^ (2) A-sin ^ (2) B) / (sin A cos A-sin B cos B) = tan (A + B)