[" complex numbers in Cartesian form : "],[qquad " (ii) "5(cos270^(@)+i sin270^(@))]

Change the following complex numbers to Cartesiasn form: 5(cos270^0 + i sin 270^0)

Change the following complex numbers to Cartesiasn form: 5(cos270^0 + i sin 270^0)

cos(270^@-theta) =

sin(270^@+theta)=

Find the value of (i) cos(-30^(@)) " " (ii) sin 120^(@) " " (iii) sin135^(@) " " (iv) cos 120^(@)" " (v) sin270^(@) " " (vi) cos270^(@)

Express the following complex numbers in the form r(cos theta+i sin theta):1+i tan alpha( ii) tan alpha-i

cos A + sin(270^(@) +A)-sin(270^(@)-A)+ cos(180^(@)-A)=

Change the complex number 4(cos 300^(@) + i sin 300^(@)) to cartesian form

Select and write the correct answer from the given alternatives in each of the following: tan180^@ x sin270^@ + sin90^@ =……….

Find the values of : (i) tan (-30^(@)) (ii) sin 120^(@) (iii) sin 135^(@) (iv) cos 150^(@) (v) sin 270^(@) (vi) cos 270^(@)