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

Prove that (1)sin2A=2sin A cos A(2)cos2A=cos^(2)A-sin^(2)A

If A=60^(@) , verify that : (i) sin^(2)A+cos^(2)A=1" (ii) "sec^(2)A-tan^(2)A=1

If A=60^(@) , verify that : (i) sin^(2)A+cos^(2)A=1" (ii) "sec^(2)A-tan^(2)A=1

If A= 30^@ verify that :- cos2A=1- 2sin^2A .

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)

Prove that (1)cos2A=2cos^(2)A-1(2)cos2A=1-2sin^(2)A

If A= 45^@ , verify that : cos 2A = cos^2 A - sin^2 A.

if A= 45^o then verify sin2A=2sinAcosA , cos2A=1-sin^2A