`cos225^@+sin195^@=`

Evaluate. cos225^(@)-sin225^(@)+tan495^(@)-cot495^(@)

cos 225^(@)+ sin 165^(@)=

Find the values of the following trigonometric ratios : cos225^@ , sin 690^@ , tan(-390^@) , sec 855^@

Find cos 225^(@) -sin 225^(@) +tan 495^(@) - cot 495^(@) .

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)]

sin 225^@ =

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

Find the value of Cos 225^@ Cos 225^@ का मान ज्ञात कीजिए

(sin(-660^@)tan(1050^@).sec(420^@))/(cos(225^@)cosec(315^@)cos(510^@))=