First we have to find the missing angle. And we know that sum of the measurement of angles of a triangle is 180.
So we will get
Now we use sine law, which is
Substituting the values, we will get
The formula of area of triangle, for the given triangle is
There isn't really any work to show, but that is correct!
Answer:Store A
Step-by-step explanation:
Given
Store A sells 3 cells phones that cost $165 each and offer 4 th one free
i.e. Effective cost of each cell phone is
Store B sells each cell phone at each
clearly, store A provides a better deal than B because the cost of 4 cell phones is less for Store A i.e.
Answer:
Proved
Step-by-step explanation:
2 sin square( 45°-A)
(therefore;
by trigonometry ratios
sin45°=1)
=2sin2(1-A)
=2sin(1-A)
=1+sin2A
hence proved
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