[" 13.If "A=30^(@)" ,verify that: "],[" (i) "sin2A=(2tan A)/(1+tan^(2)A)]

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)

If /_A=30^(@), verify each of the following (i)sin2A=(tan A)/(1+tan^(2)A)(ii)cos A=(1-tan^(2)A)/(1+tan^(2)A)

Taking A=30^(@) , verify the following: tan2A=(2tanA)/(1-tan^(2)A)

If A=30^(@) , then prove that : sin2A=2sinAcosA=(2tanA)/(1+tan^(2)A)

If A=30^(@) , then prove that : sin2A=2sinAcosA=(2tanA)/(1+tan^(2)A)

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

If A= 30^@ verify that :- cos2A= (1-tan^2A)/(1+tan^2A) .

If A= 30^@ verify that :- sinA=tanA/ sqrt(1+tan^2A) .

Verify that sin60^(@)=(2tan 30^(@))/(1+tan^(2)30^(@))

If x=30^@ , verify that : (i) tan2x=(2tanx)/(1-tan^2x) (ii) sinx=sqrt((1-cos2x)/2)