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`        If sintheta + sin 2 theta +sin 3 theta= sin alpha And cos theta +cos 2 theta +cos 3 theta= cos alpha. Then theta is equal to.....????`
7 months ago

1817 Points
```							first eqn cn be written as sintheta + sin3theta +sin 2 theta= sin alphaor sin2theta(1+2costheta)= sinalphasimilarly second eqn cn b writen as cos2theta(1+2costheta)= cosalphadivide both eqns to get tan2theta= tanalphaor 2theta= alphaor theta = alpha/2kindly approve :)
```
7 months ago
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### Course Features

• 31 Video Lectures
• Revision Notes
• Test paper with Video Solution
• Mind Map
• Study Planner
• NCERT Solutions
• Discussion Forum
• Previous Year Exam Questions