Evaluate the following: `cos^2 30o+cos^2 45o+cos^2 60o+cos^2 90o` (ii) `tan^2 30o+tan^2 60o+tan^2 45o`

Evaluate the following: Tan^2 30^@ + Cot^2 45^@ - Cos 60

Evaluate the following: (i) 2sin^2 30o-3cos^2 45o+tan^2 60o (ii) sin^2 30ocos^2 45o+4tan^2 30o+1/2sin^2 90o-2cos^2 90o+1/(24)cos^2 0o .

Evaluate the following: cos e c^3 30ocos60otan^3 45osin^2 90osec^2 45ocot30o (ii) cot^2 30o-2cos^2 60o-3/4sec^2 45o-4sec^2 30o

Evaluate the following: (tan^2 60o+4cos^2 45o+3sec^2 30o+5cos^2 90o)/(cos e c\ 30o+sec60o-cot^2 30o)

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

Evaluate each of the following: (sin60^o)/(cos^2 45^o)-cot30^o + 15cos90^o\ (ii) (5sin^2 30^o + cos^2 45^o-4tan^2 30^o)/(2sin30^ocos30^o + tan45^o)

Evaluate the following: (i) cos60ocos45o-sin60osin45o (ii) sin^2 30o+sin^2 45o+sin^2 60o+sin^2 90o

Evaluate the following expressions: 2sin^2 30otan60o-3cos^2 60osec^2 30o (ii) "c o s e c"^2 30osin^2 45o-sec^2 60o (iii) tan60ocos e c^2 45o+sec^2 60otan45o

Evaluate the following expressions: (i) 4cot^2 45o-sec^2 60^o + sin^2 60^o + cos^2 90^o . (ii) 3cos^2 30^o + sec^2 30^o + 2cos0^o + 3sin90^o - tan^2 60^o

Evaluate each of the following: (sin60o)/(cos^(2)45o)-cot30o+15cos90o( (ii) (5sin^(2)30o+cos^(2)45o-4tan^(2)30o)/(2sin300cos30o+tan45o)