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TRIGONOMETRIC IDENTITIES AND EQUATIONSMaxHalf-angle identities: Problem type 1EspañolUse a half-angle formula to find the exact value of cos85пCOS8?Aa

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TRIGONOMETRIC IDENTITIES AND EQUATIONS
Max
Half-angle identities: Problem type 1
Español
Use a half-angle formula to find the exact value of cos
8
5п
COS
8
?
Aa
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TRIGONOMETRIC IDENTITIES AND EQUATIONS Max Half-angle identities: Problem type 1 Español Use a half-angle formula to find the exact value of cos 8 5п COS 8 ? Aa

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check_circleAnswer
Step 1

Given function is

57T
cos
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57T cos

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Step 2

To find out 

the value of COs
using half angle formula
8
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the value of COs using half angle formula 8

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Step 3

Half angle for...

COs
2
2
1+ cos e
ө
cos
=t,
2
2
5л е
if
2
Then
5л
ө-
41
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COs 2 2 1+ cos e ө cos =t, 2 2 5л е if 2 Then 5л ө- 41

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Tagged in

Math

Trigonometry

Trigonometric Ratios

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