Question

If cos A=3/5,then find the value of sin A-cos A/2tanA​

Answer 1

Step-by-step explanation:

cos A =3/5

sin A = 2/5 , using sin²A +cos²A =1

tanA =sin A/cos A

= 2/3

→(sin A - cos A )/2tan A

→

$( \frac{2}{5} - \frac{3}{5} ) \div ( 2 \times \frac{2}{3} ) \\ ( - \frac{1}{5} ) \div ( \frac{4}{5} ) \\ = \frac{ - 1}{4}$