For A=30 verify sin2A=2sinAcosA

if A=45^(@) then verify sin2A=2sin AcosAcos2A=1-sin^(2)A

If A=45^(@) , verify that (i) sin2A=2sinAcosA (ii) cos2A=2cos^(2)A-1=1-2sin^(2)A

If A=30o and B=60o ,verify that sin(A+B)=sin A cos B+cos A sin B(ii)cos(A+B)=cos A cos B-sin A sin B

Taking A=60^(@) and B=30^(@) , verify that : sin(A-B)=sinAcosB-cosAsinB .

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

If A =30^(@) ,verify that cos2A =cos^(2)A-sin^(2)A .

If A= 45^(@) , verify that: (i) sin 2A=2 sin A cos A (ii) cos 2A= cos^(2)A-"sin"^(2)A .

If A= 30^(@) and B=60^(@) verify that: sin (A+B)= sin A cos B +cosA sin B.

If A=60^(@) and B=30^(@) , verify that : (i)sin(A+B)=sinAcosB+cosAsinB (ii) cos(A+B)=cosAcosB-sinAsinB

If A=30^(@) , verify that (i) sin2A=(2tanA)/(1+tan^(2)A) (ii) cos2A=(1-tan^(2)A)/(1+tan^(2)A) (iii) tan2A=(2tanA)/(1-tan^(2)A)