f^3+11g-4hf 3 +11g−4hf, cubed, plus, 11, g, minus, 4, h when f=3f=3f, equals, 3, g=2g=2g, equals, 2 and h=7h=7h, equals, 7.
Alik [6]
Given:
The expression is:

The given values are
.
To find:
The value of the given expression for the given values.
Solution:
We have,

After substituting
, we get




Therefore, the value of the given expression is 21.
Answer:
option 3
Step-by-step explanation:
Using the Sine rule in Δ ABC, that is
=
, that is
=
( cross- multiply )
CA × sin30° = 20 × sin45° ( divide both sides by sin30° )
CA =
→ (3)
I don’t understand I’m so sorry ....