20(1-sin A+cos A)^(2)" is equal to "

In Delta ABC, angle B = 90^(@), AC = 29 cm and BC = 20 cm. Then ( 1 - sin A + cos A)/( 1 + sin A + cos A) is equal to :

(1-cos A)/(sin A) is equal to

If cos20-sin20=p, then cos40 is equal to

The value of the expression 1- (sin ^ (2) y) / (1 + cos y) + (1 + cos y) / (sin y) - (sin y) / (1-cos y) is equal to

The value of sin^(-1) (sin 12) - cos^(-1) (cos12) is equal to :

cos^(2)20^(@)+cos^(2)70^(@) is equal to :

(d^(20))/(dx^(20))(2cos x cos3x) is equal to (a) 2^(20)(cos2x-2^(20)cos3x)(b)2^(20)(cos2x+2^(20)cos4x)(c)2^(20)(cos2x+2^(20)sin4x)(d)2^(20)(sin2x-2^(20)sin4x)

" (2) "sin^(-1)x+sin^(-1)(1/x)+cos^(-1)x+cos^(-1)(1/x)" is equal to "

The value of sin^(-1)sin17+cos^(-1)cos10 is equal to

The value of sin^(-1)sin17+cos^(-1)cos10 is equal to