`(cos 10^0+s in 10^0)/(cos 10^0-s in 10^0)` is equal to `tan55^0` b. `cos 55^0` c.`-tan35^0` d. `-cot35^0`

(cos 10^0+sin 10^0)/(cos 10^0-sin 10^0) is equal to tan55^0 b. cos 55^0 c.-tan35^0 d. -cot35^0

Value of (cos 12^0+s in 12^0)/(cos 12^0-s in 12^0) is equal to t a n 417^0 b. t a n 237^0 c. t a n 57^0 d. t a n 663^0

Prove that (cos10^(@)+sin10^(@))/(cos10^(@)-sin10^(@))=tan55^(@)

Prove that :(cos10^(@)-sin10^(0))/(cos10^(@)+sin10^(0))=tan35^(@)

(cos20^(0)+8sin70^(0)sin50^(@)sin10^(0))/(sin^(2)80^(@)) is equal to

Prove that: (cos11^(0)+sin11^(0))/(cos11^(0)-sin11^(0))=tan56^(@)

If 47^(0)+s in61^(0)-s in11^(0)-s in25^(0) is equal to a*sin36^(@) b.cos36^(@) c.cos7^(0) d.cos7^(0)

cos10^(0)cos30^(0)cos50^(@)cos70^(0)

cos25^(0)cos35^(0)-sin10^(0)sin20^(0) ,

Evaluate each of the following: (a) cos(40^0-theta)-sin(50^0+theta)+(cos^2 40^0+cos^2 50^0)/(sin^2 40^0+sin^2 50^0) (b) (cos70^0)/(sin20^0)+(cos55^0cos e c35^0)/(tan5^0tan25^0tan45^0tan65^0tan85^0) (c) 2((cos58^0)/(sin32^0))-sqrt(3)((cos38^0cos e c52^0)/(tan15^0tan60^0t a n75^0))