Ashopkeeper blends3 types of tea a,b,c in a ratio 6: 4: 7. if the mass ofv tea c in the mixture is 28kg find the difference in the mass of other 2 of teas

1.

Step-by-step explanation:

sec 16° cosec 74° - cot 74° tan 16°

= 1/ cos 16 * 1/ sin 74 - 1/tan 74 * tan16

= 1/ cos16 sin 74 -  cos74/ sin74 *  sin 16 / cos 16

Now cos 16 = sin 74  and sin 16 = cos 74  (supplementary angles) so:

= 1 / cos^2 16   - sin 16/cos 16 * sin 16 / cos 16

=( 1 - sin ^2 16 )/ cos^2 16

= cos^2 16 / cos^2 16

= 1.