Answer:
cosA = -
Step-by-step explanation:
Using the double angle identity
cos2A = 2cos²A - 1 , then
cosA = 2cos²( ) - 1 , that is
cosA = 2 × ( )² - 1
= 2 × - 1
= -
= -
Please help hurry. Drag each number to the correct location on the table.
2 answers:
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Answer:
Correct choce is (a). 30.
Step-by-step explanation:
Given equation is .
Now we need to find the value of (fof)(3). Then select correct matching choice from the given choices. Where given choices are:
(a). 30
(a). 33
(a). 6
(a). -6
Now let's find
Hence correct choce is (a). 30.