Find the value of
(i) cos 15 `pi` (ii) sin 16`pi` (iii) cos `(-pi)`
(iv) sin 5`pi` (v) tan `((5pi)/(4))` (vi) sec 6`pi`

Find the value of (cos pi+i sin pi)

Find the value of (i) " sin " ((31pi)/(3)) " (ii) " cos " ((17pi)/(2)) " " (iii) " tan " ((-25pi)/(3)) (iv) " cot " ((13pi)/(4)) " " (v) " sec " ((-25pi)/(3)) " " (vi) " cosec " ((-41pi)/(4))

Find the value of sin(pi/4)cos(pi/6) + cos(pi/4)sin(pi/6)

Find the value of sin^(-1) (sin . (5pi)/8 cos . (pi)/8 - cos . (5pi)/8 sin. (pi)/8)

Find the value of cos^(-1)(cos . (5pi)/9 cos .pi/9 - sin . (5pi)/9 . sin. (pi)/9 )

Find the value of: (i) cos 210^(@) (ii) "sin" 225^(@) (iii) "tan" 330^(@) (iv) cot(-315^(@)) (v) "sec"(11pi)/(4)

Find the Values of sin (pi/8) ,cos (pi/ 8) ,sec (pi/8) ,cosec (pi/8) ,tan (pi/8) and Cot (pi/8)

The value of 3 sin (pi/6) "sec" (pi/3) - 4 sin (5pi/6) cot (pi/4) is-

cos ((5pi)/(4)) - sin ((5pi)/(4)) + tan((11pi)/(4)) - cot((11pi)/(4))=