Evaluate : `tan35^0tan40^0tan45^0tan50^0tan55^0`

Evaluate: tan35^(@)tan40^(@)tan45^(0)tan50^(@)tan55^(@)

Evaluate tan 40^@ xx tan 50^@

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))

Evaluate :tan7^(0)tan23^(@)tan60^(@)tan67^(0)tan83^(@)

Evaluate : tan 35^(@) tan 60^(@) tan 30^(@) tan65 .

Without using trigonometric tables, evaluate each of the following: (cos^2 20^0+cos^2 70^0)/(sec^2 50^0-cot^2 40^0)+2cosec^2 58^0-2cot58^0tan32^0- 4tan13^0tan37^0tan45^0tan53^0tan77^0

Prove that: tan10^0tan15^0tan75^0tan80^0=1 tan1^0tan2^0tan3^0tan89^0=1 cos1^0cos2^0cos3^0cos180^0=0

Value of tan25^(@)tan35^(@)tan45^(@)tan55^(@)tan65^(@) is

Find the value of (cot25^0+cot55^0)/(tan25^0+tan55^0)+(cot55^0+cot100^0)/(tan55^0+tan100^0)+(cot100^0+cot25^0)/(tan100^0+tan25^0)

value of tan6^0tan42^0tan66^0tan78^0 is equal to - a) 1 b) 2 c) 1/4 d) 1/8