Question

the value of cos 78 . cos 12-sin 27.cos 3 = -1/4
PLs explain and verify

Answer 1

Step-by-step explanation:

the value of a cos is 78 and the different causes 12cm so then III causes of -1 by food so it is of we have to take out the number line and then we have to make it out and show first the sum of all the cause is is c o is take out the sum of 7812 and 27 and then divided by 3 e sorry x 3 and 1 by 4

Answer 2

Step-by-step explanation:

value of cos 78 is 0.207

value of cos 12 is 0.978

value of sin 27 is 0.453

value of cos 3 is 0.998

cos78. cos12 - sin 27 . cos3

0.207 * 0.978 - 0.453 * 0.998

-0.249

-(1/4)