Answer:
b.
Step-by-step explanation:
The given function is

Recall that the reciprocal of the cosine ratio is the secant ratio.
This implies that;



We take the inverse cosine of both sides to obtain;

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Answer:
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Hi there!
The Eqn. is :-
1.5 (x + 4) - 3 = 4.5 (x - 2)
1.5x + 6 - 3 = 4.5x - 9
Combining the like terms :-
1.5x - 4.5x = - 9 - 6 + 3
- 3x = - 15 + 3
- 3x = - 12
x =

x = 4
Hence, the required answer is → x = 4
~ Hope it helps!