Home
Class 12
MATHS
Show that sin 1140^(@) cos 390^(@)-cos 7...

Show that `sin 1140^(@) cos 390^(@)-cos 780^(@) sin 750^(@) = 1//2`.

Text Solution

Verified by Experts

The correct Answer is:
`=sin (60^(@)-30^(@))=sin30^(@)=1//2`
Promotional Banner

Topper's Solved these Questions

  • TRIGONOMETRIC RATIONS, TRANSFORMATIONS

    SRISIRI PUBLICATION|Exercise LAQ|64 Videos

  • TRIGONOMETRIC RATIONS, TRANSFORMATIONS

    SRISIRI PUBLICATION|Exercise LAQ|64 Videos

  • TRIGONOMETRIC EQUATIONS

    SRISIRI PUBLICATION|Exercise SPQ|8 Videos

Similar Questions

Explore conceptually related problems

Show that cos 340^(@) cos 40^(@)+sin 200^(@) sin 140^(@) = 1/2 .

Show that sin 750 ^(@) cos 480^(@) + cos 120 ^(@) cos 60 ^(@)=-1/2

sin 420^(@) * cos 390^(@)- cos(-330^(@))* sin(-300^(@))=

Show that cos 36^(@) cos 54 ^(@) -sin 36^(@) sin 54^(@) =0

Show that : cos 36^(@) cos 54^(@) - sin 36^(@) sin 54^(@) = 0 .

Prove that sin 780^(@) sin 480^(@)+cos240^(@). Cos300^(@) = 1/2

Prove that sin750^(@)cos480^(@)+cos120^(@)cos60^(@)=(-1)/2