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cos 48^(@) - sin 42^(@) = ……………....

`cos 48^(@) - sin 42^(@)` = …………….

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cos^2 48^@-sin^2 12^@=

Let z_(1)= cos 12^(@) + I sin 12^(@) and z_(2) = cos 48^(@) + i. sin 48^(@) . Write complex number (z_(1) + z_(2)) in polar form. Find its modulus and argument.

Let z_(1)= cos 12^(@) + I sin 12^(@) and z_(2) = cos 48^(@) + i. sin 48^(@) . Write complex number (z_(1) + z_(2)) in polar form. Find its modulus and argument.

Evaluate: cos48^(@)-sin42^(@)

cos^(2)48^(@)-sin^(2)12^(@)=?

cos ^(2) 48^(@) - sin ^(2) 12 ^(@) = (sqrt5+1)/(8).

Evaluate cos 48^(@) cos 42^(@) - sin48^(@) sin 42^(@)

Evaluate cos 48^(@) cos 42^(@) - sin48^(@) sin 42^(@)

Find the value of cos48^(@)-sin42^(@) .

Evaluate : (i) (cos 55^(@))/(sin 35^(@)) + (cot 35^(@))/(tan 55^(@)) (ii) sin 42^(@) sin 48^(@) - cos 42^(@) cos 48^(@)