Answer:
Step-by-step explanation:
Given
Required
Match the above with the appropriate identity from
Solving (A):
In trigonometry,
So, we have:
Split
In trigonometry
So, we have:
--- proved
Solving (b):
Multiply by --- an equivalent of 1
So, we have:
In trigonometry:
So, we have:
Split
Rewrite as:
Express
--- proved
Solving (C):
In trigonometry
and
So, we have:
Multiply by --- an equivalent of 1
Express and
In trigonometry:
So, we have:
Split
Simplify
proved
Solving (D)
Open bracket
So, we have:
Split
So, we have:
--- proved
Solving (E):
In trigonometry
So, we have:
Multiply by --- an equivalent of 1
Open bracket
Express 2 as 1 + 1
Express 1 as
Rewrite as:
Expand
Factorize
Factor out 1 - sin(x)
Express as squares
Split
Cancel out like factors
--- proved
Answer:
Step-by-step explanation:
What is the area of the triangular base? 8 square feet
What is the length of edge DF? 4 feet