In ∆ABC, which ratio equals cos C? A. a - b B. c - b C. a - b D. c - a
In ∆ABC, which ratio equals cos C?
A. a
-
b
B. c
-
b
C. a
-
b
D. c
-
a
Answer: D.
Step-by-step explanation:
In triangle ∆ABC, the ratio that equals cos C is (c - a)
![1. Two functions f(x) and g(x) are defined on the set of real numbers by f(x) = 3x²
2 − 2, and g(x) = x+3. Find : (i) f(-2)
(ii) g−1( − 2);
(iii) the value of x for which f[g(x)] = g[f(x)]
(iv) f−1[g(4)]](http://1.bp.blogspot.com/-aR5w9KXuWGU/XhSDNRAVuhI/AAAAAAAAHG8/dLxcaZxSgh0v85JG0mWRMQyEwqMgpL1_gCLcBGAsYHQ/w159-h89-c/no-image.jpg)
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