Prove that `(cos0^@+sin30^@+sin45^@)(sin90^@+cos60^@-cos45^@)=7/4`

Choose the correct answer in each of the following questions: (cos0^(@)+sin30^(@) +sin45^(@))(sin 90^(@) + cos60^(@)-cos45^(@))=?

The value of (cos 0^(@) + sin 45^(@) + sin 30^(@)) (sin 90^(@) - cos 45^(@) + cos 60^(@)) is

Evaluate cos45^(@)cos30^(@)+sin45^(@)sin30^(@) .

6cos60^(@) -sin30^(@)+sin^(2)45^@+cos^(2)45^@

The value of ("tan"^2 30^@ + 1/2 "sin"^2 90^@ + 1/8 "cot"^2 60^@ + "sin"^2 30^@ "cos"^2 45^@)/("sin" 60^@ "cos"30^@ - "cos"60^@ "sin"30^@)

The value of cos0^@ cos30^@ cos45^@ cos60^@ cos 90^@ is: cos0^@ cos30^@ cos45^@ cos60^@ cos 90^@ का मान क्या होगा ?

Verify each of the following : (i) sin60^(@)cos30^(@)-cos60^(@)sin30^(@)=sin30^(@) (ii) cos60^(@)cos30^(@)+sin60^(@)sin30^(@)=cos30^(@) (iii) 2sin 30^(@)cos30^(@)=sin60^(@) (iv) 2sin45^(@)cos45^(@)=sin90^(@)

The value of (sin 30^@ sin 60^@)/(cos 60^@ cos 30^@)-tan45^@ is : (sin 30^@ sin 60^@)/(cos 60^@ cos 30^@)-tan45^@ का मान है?

frac(sin 30^.cos 45^@)(tan 60^@)