What is the value of tan (-1575 ^@)?(a) 1(b) 1/2

Find tha value of cos(-1575^@)

What is the value of sec^(2)(tan^(-1)2)

What is the value of tan 1^(@) tan 2^(@) tan 3^(@) .......... tan 89^(@) ?

What is the value of (tan45^(@)+(1)/(sqrt(2))) ?

What is the value of 2tan^(-1)(1/3)+tan^(-1)(1/7) ?

What is the value of (2tan30^@)/(1-tan^2(30^@) ?

Let sin (A+B) = 1 and sin (A-B) = 1//2 where AB epsilon[0,(pi)/(2)] . What is the value of tan (A+2B). tan(2A+B)?

What is the value of tan[(1)/(2)cos^(-1)((3)/(5))]+tan[(1)/(2)cos^(-1)((4)/(5))]? (a) (5)/(6) (b) (-5)/(6) (c) (1)/(2) (d) 0

The value of tan(2tan^(-1)(1/5))

What is the value of tan (tan^-1""1/2+tan^-1""1/3).