Question

In Cos A = 0.4 Find The Value Of Cos 3 A.Thenku ☃️exFormula1" title=" \: \: " alt=" \: \: " align="absmiddle" class="latex-formula">
​

Answer 1

Answer:
- 0.944

Step-by-step explanation:
We know that,
cos 3A = 4 cos³A - 3 cos A (formula)

So,
If cos A = 0.4,

cos 3A = 4 cos³A - 3 cos A
cos 3A = 4 × (0.4)³ - 3 × (0.4)
cos 3A = 4 × 0.064 - 1.2
cos 3A = - 0.944


Hope it helps ⚜

Answer 2

Answer:

Science is a systematic enterprise that builds and organizes knowledge in the form of testable explanations and predictions about the universe. The earliest roots of science can be traced to Ancient Egypt and Mesopotamia in around 3000 to 1200 BCE.

Step-by-step explanation:

◖⚆‿⚆◗