Q1) solve: 3^(sinx +cosy)=1 and 25^{(sinx)^2 + (cosy)^2}=5
Yuvc , 6 Years ago
Grade 12th pass
Trigonometry> Q1) solve: 3^(sinx +cosy)=1 and 25^{(sinx...
1 Answers
Arun
Last Activity: 6 Years ago
Dear student
3^(sinx + cosy) = 1
Hence sinx + cos y = 0
sinx = - cosy
Now
25^(cos²y + cos²y) = 5
2cos²y = ½
Cos²y = ¼
Cos²y = cos² pi/3
y = 2n*pi ± pi/3
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