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`        Without using table solve the following; cot 75°Tan 90°Cosec 15°              `
4 months ago

Arun
23036 Points
```							Cot(-75)=-Cot 75⁰Cot(A+B)=( CotA CotB-1)/(CotA+CotB)- Cot 75⁰= -Cot(45⁰+30⁰)= −[(Cot 45⁰Cot30⁰-1)/(Cot45⁰+Cot30⁰)]= -(√3–1)/(1+√3)= (1-√3)/(1+√3)= (1-√3)(1-√3)/(1+√3)(1-√3)=( 4–2√3)/(-2)= √3–2
```
4 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