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# OCR core 3 June 2005, Question 5)ii) Watch

1. I have got one solution to this but the other solution is 70.2 and i just dont know how to get it! Please help.
I've shown my working so far but I think the bit at the end must be wrong.
2. (Original post by Lilli1997)
I have got one solution to this but the other solution is 70.2 and i just dont know how to get it! Please help.
I've shown my working so far but I think the bit at the end must be wrong.
To get the solution of 70.2 you have to see on the diagram of sin that there will be two solutions, you then do: 90-76.102... and then add that answer to 90 to get the value of theta in the adjusted range. Then you subtract 33.7 from both solutions and get 42.4 and 70.2
3. (Original post by magnusc)

To get the solution of 70.2 you have to see on the diagram of sin that there will be two solutions, you then do: 90-76.102... and then add that answer to 90 to get the value of theta in the adjusted range. Then you subtract 33.7 from both solutions and get 42.4 and 70.2
Thank you so much!
4. (Original post by Lilli1997)
Thank you so much!
No worries, good luck with it all!

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