What is the exact value of cos (67.5° )?
1 answer:
Answer:
0.38268343
Step-by-step explanation:
cos(
67.5
)
Rewrite
67.5
as an angle where the values of the six trigonometric functions are known divided by 2
.
cos
(
135\
2)
Apply the cosine half-angle identity.
±
√
1
+
cos
(
135
)
2
Change the
±
to
+
because cosine is positive in the first quadrant.
√
1
+
cos
(
135
)
2
Simplify
√
1
+
cos
(
135
)
2
√
2
−
√
2
2
The result can be shown in multiple forms.
Exact Form:
√
2
−
√
2
2
Decimal Form:
0.38268343
…
You might be interested in
Answer:
y - 2 = x + 3
y = x + 5
-x + y = 5 standard form
The answer is C. 2x+3y=12
22 = 100%
26,40 = x%
26,4*100/22=120%
x=120%
120%-100%=20%
The answer is 20%
Answer:
Are you in Connexus ?
Step-by-step explanation:
If you're looking for x then it's 7. The value of -4 is -4.
