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BlingBlong
 4 years ago
Solve cos^(2)(x)  3sin(x) = 3 for x on [0, 2pi]
So I have simplified the function down to
(sin(x)  2)(sin(x) + 1) = 0
or
(sin(x) 1)(sin(x) + 2) = 0
I have determined x = 3pi/2 as sin(3pi/2) = 1/2
Is that the only value possible As I don't think there is a value in the domain of this function that I could use to solve
(sin(x) + 2)
or
(sin(x)  2)
I could imput arcsin(2) but would that be wrong and if so why?
BlingBlong
 4 years ago
Solve cos^(2)(x)  3sin(x) = 3 for x on [0, 2pi] So I have simplified the function down to (sin(x)  2)(sin(x) + 1) = 0 or (sin(x) 1)(sin(x) + 2) = 0 I have determined x = 3pi/2 as sin(3pi/2) = 1/2 Is that the only value possible As I don't think there is a value in the domain of this function that I could use to solve (sin(x) + 2) or (sin(x)  2) I could imput arcsin(2) but would that be wrong and if so why?

This Question is Closed

watchmath
 4 years ago
Best ResponseYou've already chosen the best response.1because the value of sin is at most 1. SO arcsin(2) is undefined. So the solutions only comes from sin x 1 =0

BlingBlong
 4 years ago
Best ResponseYou've already chosen the best response.0made a typo. so I'm correct.

watchmath
 4 years ago
Best ResponseYou've already chosen the best response.1yes \(e\pi/2\) is the only answer

BlingBlong
 4 years ago
Best ResponseYou've already chosen the best response.0so I should always adhere to the range of the unit circle when dealing with trig functions?

BlingBlong
 4 years ago
Best ResponseYou've already chosen the best response.0yeah I was wondering lol
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