Solve the following equations for values of theta in the range 0 is less than and equal to theta and less than and equal to 360°. Sin 4 theta + sin 2 theta = 0
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sin2A+sin4A=0
sin2A+2sin2Acos2A=0
sin2A(1+2cos2A)=0
1+2cos2A=0
2cos2A=–1
cos2A=–1/2
cos2A=cos120°
2A=120°
A=60°
here i take theta =A
because i haven't idea to write symbol of theta.
hope this satisfies you
sin2A+2sin2Acos2A=0
sin2A(1+2cos2A)=0
1+2cos2A=0
2cos2A=–1
cos2A=–1/2
cos2A=cos120°
2A=120°
A=60°
here i take theta =A
because i haven't idea to write symbol of theta.
hope this satisfies you
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