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TheWolf
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#1
Report Thread starter 16 years ago
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how? i know that arcsin is the inverse of sin..etc but how do you solve them>?
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Silly Sally
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(Original post by TheWolf)
how? i know that arcsin is the inverse of sin..etc but how do you solve them>?
If you give me an examle of a question, i will TRY to help
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TheWolf
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Report Thread starter 16 years ago
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(Original post by Silly Sally)
If you give me an examle of a question, i will TRY to help

ehh dunno arcsin -0.5?
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Silly Sally
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Actually i found a question from the P2 mock paper:

arctan x = 1
tan^-1 x = 1
x = tan1
x= 1.557407725... radians

Does that make any sense? You're basically using inverse - it is like normal trig, but instead of converting tanx ---> arctan to find x, we are doing the opposite.
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Jonny W
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(Original post by TheWolf)
ehh dunno arcsin -0.5?
Let y = arcsin(-1/2). Then sin(y) = -1/2 so y = -pi/6. Remember that arcsin of anything is between -pi/2 and pi/2.
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qqqwwweee
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#6
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why use your calculator?
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