Question
Asked Nov 5, 2019

solve the equation 2cos(x+   7π/4)=√3 giving the exact solution which lie in [0,2π)

check_circleExpert Solution
Step 1

Divide by 2.

2cosX+
4
3
V3
7л
cos X+
4
2
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2cosX+ 4 3 V3 7л cos X+ 4 2

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Step 2

Take cos inverse. For cos^-1(sqrt(3)/2) too...

3
7л
cos X+
4
2
3
7л
x+ cos
4
2
л 11л 13л 23л
6
7 x
X+
4
6 6
6
help_outline

Image Transcriptionclose

3 7л cos X+ 4 2 3 7л x+ cos 4 2 л 11л 13л 23л 6 7 x X+ 4 6 6 6

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