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(2tan3 0^(@))/(1-tan^2 3 0^(@))is equal ...

`(2tan3 0^(@))/(1-tan^2 3 0^(@))`is equal to (a)`sin60^(@)` (b) `cos60^(@)` (c) `tan60^(@)` (d) `sin30^(@)`

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(2tan30^@)/(1-tan^2 30^@) is equal to (a) cos60^@ (b) sin60^@ (c) tan60^@ (d) sin30^@

Choose the correct option and justify your choice : (i) (2tan30^@)/(1+tan^2 30^@) (a)\ sin 60^@ (b)\ cos 60^@ (c)\ t a n 60^@ (d)\ sin 30^@

Find the value of (a) cos 120^(@) (b) sin 240^(@) (c) tan (-60^(@)) (d) cot 300^(@) (e) tan 330^(@) (f) cos (-60)^(@) (g) sin (-150)^(@) (h) cos ( -120)^(@)

Find the value of sin60^(@)cos30^(@)+cos60^(@)sin30^(@) .

Find the value of (sin30^(@))/(cos^(2)45^(@))-tan^(2)60^(@)+3cos90^(@)+sin0^(@) .

Prove that : sin60^(@)cos30^(@)+cos60^(@).sin30^(@)=1

Find the value of : (sin30^(@)-sin90^(@)+2cos0^(@))/(tan30^(@) times tan60^(@))

Show that : cos^(2)60^(@)-sin^(2)60^(@)=-sin30^(@)

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

Evaluate : (tan45^(@))/(2sin30^(@)-cos60^(@))

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