Solving Trig. Functions?? (1 Viewer)

Smile12345

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Evening All

Could someone please help me with the following questions?

Solve for

*

*

Thanks in advance. :)

Smile. :)
 

bongoli

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The 4th line is not right. Inverse sine of 1 gives only one value.
Nope, OP is right. There is only one value for sin (correct) in the first 360 degrees, but since this question specifies sin3x, means 3 revolutions and thus 3 answers.
 

Trebla

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Nope, OP is right. There is only one value for sin (correct) in the first 360 degrees, but since this question specifies sin3x, means 3 revolutions and thus 3 answers.
I think what braintic meant was that technically speaking, writing sin-11 only gives one angle, not the other angles which are also solutions. If you learn inverse trig functions (this is an ext1 topic) sin-11 = pi/2 only.
 

bongoli

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I think what braintic meant was that technically speaking, writing sin-11 only gives one angle, not the other angles which are also solutions. If you learn inverse trig functions (this is an ext1 topic) sin-11 = pi/2 only.
ahh figured, makes more sense
 

photastic

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Sorry guys, I should've added some explanation to clarify the triple revolutions.
 

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