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`        cos(alpha+beta)= 0 then sin(alpha + 2beta) =a. sin alpha       b. cos alpha      c. sin beta      d. cos 2beta​I want answer with full solution`
4 years ago

Shubham Kamleshbhai Patel
59 Points
```							This is an easy question.
```
4 years ago
Shubham Kamleshbhai Patel
59 Points
```							cos (α+β) = 0 So let (α+β) = θ.Then cos θ = 0 => θ = 90° Thus (α+β) = 90° So, β = 90° – α -------------------------- (1) Substituting (1) in sin (α+2β),=> sin [α + 2(90° – α)]=> sin(180° – α)=> sin αSO THE CORRECT OPTION IS A.
```
4 years 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