C3 Trig Question: Where am I going wrong?

creativebuzz

Question and my working out has attached :smile:

(edited 9 years ago)

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Reply 1

username1560589

It should be 17cos(x + 1.08) = 17

Reply 2

creativebuzz

Original post by morgan8002

It should be 17cos(x + 1.08) = 17

Oh okay

So then I would so

x + 1.08 = arccos(1)

x= 0, pi, 2pi...

And then what would I do?

Reply 3

username1560589

Original post by creativebuzz

Oh okay

So then I would so

x + 1.08 = arccos(1)

x= 0, pi, 2pi...

And then what would I do?

x + 1.08 = 0, 2pi. (cos pi = -1)

Reply 4

creativebuzz

Original post by morgan8002

x + 1.08 = 0, 2pi. (cos pi = -1)

Ah, I understand! thank you :smile:

Is it alright if you could see what else I need to do in this question? Because I managed to get 3 of the answers but apparently I'm still missing 2 other answers (1.40 and 4.88)

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Reply 5

username1560589

Original post by creativebuzz

Ah, I understand! thank you :smile:

Is it alright if you could see what else I need to do in this question? Because I managed to get 3 of the answers but apparently I'm still missing 2 other answers (1.40 and 4.88)