`cos^(2) 30^(@) + cos^(2) 45^(@) + cos^(2) 60^(@) + cos^(2) 90^(@) ` का मान ज्ञात करो ।

Evaluate: sin^(2)60^(@) cos^(2)45^(@) cos^(2)60^(@)" cosec"^(2)90^(@)

({(4) / (tan ^ (2) 60 ^ (@)) + (1) / (cos ^ (2) 30 ^ (@)) - 2sin ^ (2) 45 ^ (@)}) / ( (sin ^ (2) 60 ^ (@) + cos ^ (2) 45 ^ (@)))

cot ^ (2) 60 ^ (@) + sin ^ (2) 45 ^ (@) + sin ^ (2) 30 ^ (@) + cos ^ (2) 90 ^ (@) = (13) / (12 )

The value of sin^2 30^@ cos^2 45^@ +4 tan^2 30^@+ 1/2 sin^2 90^@+ 2cos 90^@ is : sin^2 30^@ cos^2 45^@ +4 tan^2 30^@+ 1/2 sin^2 90^@+ 2cos 90^@ का मान ज्ञात करें |

((4) / (tan ^ (2) 60 ^ (@)) + (1) / (cos ^ (2) 30 ^ (@)) - 2sin ^ (2) 45 ^ (@)) / (sin ^ (2) 60 ^ (@) + cos ^ (2) 45 ^ (@))

((4) / (tan ^ (2) 60 ^ (@)) + (1) / (cos ^ (2) 30 ^ (@)) - 2sin ^ (2) 45 ^ (@)) / (sin ^ (2) 60 ^ (@) + cos ^ (2) 45 ^ (@))

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

Find the value of (cos^2 30^@-sin^2 30^@)/(sin^2 15^@+cos^2 15^@) . (cos^2 30^@-sin^2 30^@)/(sin^2 15^@+cos^2 15^@) का मान ज्ञात कीजिए।