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

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)/(24) and (sin pi)/(24)

Find the value of (i) "sin" ((25pi)/(3))" ""(ii) cos "((41pi)/(4))"

Find the value of cos""(pi)/(12)(sin""(5pi)/(12)+cos""(pi)/(4))+sin""(pi)/(12)(cos""(5pi)/(12)-sin""(pi)/(4)) .

Find the value of sin^(-1)("sin"(2pi)/(3))+cos^(-1)("cos"(4pi)/(3))

Find the value of (a) sin(pi)/(10).sin(13pi)/(10) (b) cos^(2)48^(@)-sin^(2) 12^(@)

Find the value of: i) sin ^(-1)(sin (3pi)/5) , ii) cos^(-1)(cos(13pi)/6) , iii) tan^(-1)(tan (7pi)/6) .

Find the value of (a) sin(pi)/(8) (b) cos(pi)/(8) (c) tan (pi)/(8)

If cos x=-(sqrt(15))/(4) and (pi)/(2)

Find the value of : cos[(pi)/3-"sin"^(-1)(-1/2)]