Question

If cos A = 12/13, verify that sin ( 1 - tan A ) = 35/156

Answer 1

cos A = 12/13

sin ^2 A = 1 - cos ^2 A
 
= 1- (12/13)^2

= 1 - 144/169

= (169 -144)/169

=25/169
therefore
sin A = 5/13

tan A = sin A / cos A = (12/13)/(5/13) = 12/5

lhs = sin A(1-tan A) = 12/13 *( 1 - 12/5) 

= 12/13 * (-5-12)/5
=12/13 * (-17)/5
=- (12*17)/65
this is not equal to rhs

Answer 2

Step-by-step explanation:

hence proved Mark as brilliant ok