निम्न की सत्यता की जाँच कीजिए- 12-16 8. cos 60°cos 45°-sin 60°sin 45° = 4

Evaluate: cos 45 cos 60 - sin 45 sin 60

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

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

sin 45^@.cos 45^@ + sqrt 3 sin 60^@ =…………

Find the value of sin60sin45+cos60cos45

The value of (4 tan^2 30+1/4 sin^2 90+ 1/8 cot^2 60+ sin^2 30. cos^2 45)/ (sin60.cos30-cos60.sin30) is/ (4 tan^2 30+1/4 sin^2 90+ 1/8 cot^2 60+ sin^2 30. cos^2 45)/ (sin60.cos30-cos60.sin30) का मान है

Find the value of cos^2 30^@-2cos^2 60^@-4sin^2 45^@+tan45^@ .

Evaluate the following: (i) 4/(cot^2 30o)+1/(sin^2 60o)-cos^2 45o (ii) 4(sin^4 30o+cos^2 60o)-3(cos^2 45o-sin^2 90o)-sin^2 60o

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?