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Evaluate: 3 sin^2 30^@ + 2 tan^2 60^@ -...

Evaluate: ` 3 sin^2 30^@ + 2 tan^2 60^@ - 5 cos^2 45^@`

Text Solution

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`3sin^2 30^o +2tan^2 60^o-5cos^2 45^o`
`3(1/2)^2+2(sqrt3)^2-5(1/sqrt2)^2`
`3*1/4+2*3-5*1/2`
`17/4`.
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