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Grade 11Trigonometry

solve for x
cos x +cos y +cos(x+y) = -3/2
please explain step by step as i am a begineer .please try to answer asap?

Profile image of rashmi
11 Years agoGrade 11
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2 Answers

Profile image of Jitender Singh
11 Years ago
Ans:
Your question seems to be incomplete.
What is y. Is it variable or constant?
If it is variable, then you need to specify the relation b/w x & y.
After that, you can simply open the
cos(x+y) = cosx.cosy - sinxsiny
And then put y in x form.
Then solve for x.
Profile image of rashmi
11 Years ago
sir y is a variable
and we need to solve it not only for x but for y also please help?

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