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(2tan30o)/(1-tan^2 30o) is equal to cos6...

`(2tan30o)/(1-tan^2 30o)` is equal to `cos60o` (b) `sin60o` (c) `tan60o` (d) `sin30o`

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(2tan30o)/(1+tan^2 30o) is equal to sin60o (b) cos60o (c) tan60o (d) sin30o

(1-tan^(2)45o)/(1+tan^(2)45o) is equal to tan90o(b)1(c)sin450(d)sin0o

Choose the correct option and justify your choice :(i)(2tan30^(@))/(1+tan^(2)30^(@))(a)sin60^(@)(b)cos60^(@)(c)tan60^(@)(d)sin30^(@)

frac(sin 30^@. cos 45^@)(tan60^@ is equal to

Verify that: sin60o=(2tan30o)/(1+tan^(2)30o)=(sqrt(3))/(2) (ii) cos60o=(1-tan^(2)30o)/(1+tan^(2)30o)=(1)/(2)

(tan60^@)/(sin60^@+cos30^@)

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)

Show that: 2(cos^(2)45o+tan^(2)60o)-6(sin^(2)45o-tan^(2)30o)=6 (ii) 2(cos^(4)60o+sin^(4)30o)-(tan^(2)60o+cot^(2)45o)+3sec^(2)30o=(1)/(4)

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

Which among the following is an irrational quantity ? (a) tan 30^(@) tan 60^(@) (b) sin 30 ^(@) (c ) tan 45 ^(@) (d) cos 30^(@)

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