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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?

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?

Grade:11

2 Answers

Jitender Singh IIT Delhi
askIITians Faculty 158 Points
9 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.
rashmi
22 Points
9 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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