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

Evaluate the following: (i) 2sin^(2)30o-3cos^(2)45o+tan^(2)60o( ii) sin^(2)30o cos^(2)45o+4tan^(2)30o+(1)/(2)sin^(2)90o-2cos^(2)90o+(1)/(24)cos^(2)00

Evaluate each of the following: (sin^2 45o+cos^2 45o)/(tan^2 60o) (ii) (sin30o-sin90o+2cos0o)/(tan30otan60o)

Evaluate the following (i) sin 60^@ cos30^@ + sin 30^@ cos 60^@ (ii) 2tan^2 45^@ + cos^2 30^@ - sin^2 60^@ (iii) (cos45^@)/(sec30^@ + c o s e c 30^@) (iv) (sin30^@ + tan45^@ - c o s e c 60^@ )/(sec30^@ + cos60^@ +cot45^@) (v) (5cos^2 60^@ + 4sec^2 30^@ - tan^2 45^@ )/ (sin^2 30^@ + cos^2 30^@ )

Evaluate the following: cos ec^(3)30o cos60o tan^(3)45o sin^(2)90o sec^(2)45o cot30ccot^(2)30o-2cos^(2)60o-(3)/(4)sec^(2)45o-4sec^(2)30o

Evaluate the following: (i) sin450sin30o+cos450cos30o (ii) sin60o cos30o+cos600sin30o

Evaluate the following expressions: 4cot^(2)45o-sec^(2)60o+sin^(2)60o+cos^(2)90o .(ii) 3cos^(2)30o+sec^(2)30o+2cos0+3sin90o-tan^(2)600

Evaluate the following: (tan^(2)60o+4cos^(2)45o+3sec^(2)30o+5cos^(2)90o)/(cos ec30o+sec60o-cot^(2)30o)(sin30o)/(sin45o)+(tan45o)/(sec60o)-(sin60o)/(cot45o)-(cos30o)/(sin900)

Evaluate the following: (i) cos600cos45o-sin60sin45o( ii) sin^(2)30o+sin^(2)45o+sin^(2)60o+sin^(2)90o