If `1-1/3+1/5-1/7+1/9-1/(11)+=pi/4` , then value of `1/(1xx3)+1/(5xx7)+1/(9xx11)+` is `pi//8` b. `pi//6` c. `pi//4` d. `pi//36`

The value of int_0^pi1/(5+3cosx)dx is pi//2 b. pi//4 c. 0 d. pi//8

The value of cos^(-1)(-1)-sin^(-1)(1) is- pi b .(pi)/(2)c*(3 pi)/(2)d.-(3 pi)/(2)

The value of cos(2pi)/7cos(4pi)/7cos6/7pi is a. -1//2 b. \ 1//2 c. \ 1//4 d. 1//8

The value of sin^(-1)(cos(33pi)/5) is (3pi)/5 (b) pi/(10) (c) pi/(10) (d) (7pi)/5

The principal value of the amplitude of (1+i) is pi b.(pi)/(12) c.(pi)/(4) d.(3 pi)/(4)

The value of sin^(-1)(-3/2)+cos^(-1)(cos\ (7pi)/6) is a. (5pi)/6 b. pi/2 c. (3pi)/2 d. none of these

sin^(-1)((-1)/2) (a) pi/3 (b) -pi/3 (c) pi/6 (d) -pi/6

Calculate the value of (1 29/36 + 1 7/11 xx 4 1/8) div (5 1/9 - 63/8 div 9 9/20) .

The value of cos^(-1)(cos(5pi)/3)+sin^(-1)(sin(5pi)/3) is pi/2 (b) (5pi)/3 (c) (10pi)/3 (d) 0

If tan^(-1)(x^(2)+3|x|-4)+cot^(-1)(4 pi+sin^(-1)sin14)=(pi)/(2), then the value of sin^(-1)sin2x is (a)6-2 pi( b) 2 pi-6( c) pi-3 (d) 3-pi