[" (111) "13600225+i sin225^(@)" ) "16,(oo):45''],[+i sin A5^(@)" ) "1]

sin 225^@ =

Give the following in polar form : [3(cos 225^@ + i sin 225^@)] [6(cos 45^@+i sin 45^@)] .

Give the following products in polar form: [3(cos 225^0+i sin225^0)] [6(cos 45^0 + i sin 45^0)]

Give the following products in polar form: [3(cos 225^0+i sin225^0)] [6(cos 45^0 + i sin 45^0)]

Prove the following: (i) "sin" 10^(@) sin 50^(@) sin 70^(@)=(1)/(8) (ii) "sin" 10^(@) sin 30^(@) sin 50^(@) sin 70^(@)=(1)/(16)

Prove: (i) sin 45^(@) cos 65^(@) + sin 135^(@) cos 115^(@) = 0

Evaluate : 1-2 sin ^(2) 22.5 ^(@)

Prove that: "sin"(pi)/(5)"sin"(2pi)/(5)"sin"(3pi)/(5)"sin"(4pi)/(5)=(5)/(16) "sin"36^(@) "sin"72^(@) "sin"108^(@) sin 144^(@)=(5)/(16) .

sin5x=16sin^(5)x