Solving Trigonometric Equations
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Solve for x
4cos²x - 2=0
sec2x + 5tanx=-2
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Solution Summary
Trigonometric equations are solved.
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Hi, here is the solution
solve for x
4 cos^2(x) -2 =0
Add 2 on both sides
4 cos^2(x) = 2
Divide by 4 on both sides, we get
cos^2 (x) = 2/4
Cos^2(x) = 1/2
Take square root of on both sides,
cos (x) = 1/sqrt(2)
Here we have to find the value of x. So multiply by cos^-1 on both sides, we get
x = cos^-1 ( 1/ sqrt(2) ) [we know that cos 45 = 1/sqrt(2), =>45 ...
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