Question

cos A =12/13 show that sin A (1-tan A) =35/156

Answer 1

cos A=12/13
=>sin A=5/13
=>tan A=5/12
So, sin A(1-tan A)
=>5/13[1-(5/12)]
=>(5/13)×(7/12)=35/156
Hope, it Work"s
^_^