[" 7.पfर "A=30^(@)" ,वा fिम्तितित्त को सर्यापित करे "],[" (i) "sin2A=2sin A cos A]

If A = 30^(@) , then Prove that : (i) sin 2A = 2 sin A cos A = (2 tan A)/(1 + tan^(2)A) (ii) 2 cos^(2)A - 1 = 1 - 2 sin^(2) A

If A = 30^(@) , show that : (i) (1 + sin 2A + cos 2A)/(sin A + cos A) = 2 cos A (ii) (cos^(3)A - cos 3A)/(cos A) + (sin^(3)A + sin 3A)/(sin A) = 3

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

Verify that : sin 60^@ = 2 sin 30^@ cos 30^@

If A = 60 ^(@) and B = 30 ^(@) , find the value of (sin A cos B+ cos A sin B)^(2) + (cos A cos B - sin A sin B )^(2)

sin^(2)30+cos^(2)60

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

(sin ^ (2) 30 ^ (@) - cos ^ (2) 30 ^ (@)) / (sin ^ (2) 30 ^ (@) + cos ^ (2) 30 ^ (@)) =

The value of ("tan"^2 30^@ + 1/2 "sin"^2 90^@ + 1/8 "cot"^2 60^@ + "sin"^2 30^@ "cos"^2 45^@)/("sin" 60^@ "cos"30^@ - "cos"60^@ "sin"30^@)