Find the values of `tan 15^@ `and `tan 75^@`

Write the value of tan 75^@ .

Find the values of tan 9^@-tan 27^@-tan 63^@ + tan 81^@

Find the values of sin 15^@ , cos 15^@ and hence deduce the values of sin 75^@ and cos 75^@

Find the values of :b. tan^2 30^@+tan^2 45^@+tan^2 60^@

Find the value : tan35^@tan60^@ tan55^@tan30^@

Find the value : tan5^@tan25^@tan30^@tan65^@tan85^@

Find the value of tan 60^@ geometrically.

Write down the value of tan 480^@ .

Find the value of tan ^2theta sin^2 theta+ sin^2 theta-tan^2theta-1 =0

In an isosceles triangle ABC if AB = AC= 10 cm and BC =12 cm, find the values of tan /_ACB and cosec /_ACB .