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`         can ypu please solvetan(2tan-1 1/5)tan-1(1) +cos-1(-1/2)  `
one year ago

Utsav Basu
70 Points
```							Ans 1: Let θ = tan-1 1/5Then the expression reduces to   tan 2θ= 2tan θ/(1 – tan2θ)= 2tan(tan-1​ 1/5)/(1 – (tan(tan-1​ 1/5))2)= 5/12 Ans 2:   tan-1(1) +cos-1(-1/2)= π/4 + 3π/4= π
```
one year ago
Rohit Sharma
63 Points
```							1- Let y= tan-1(1/5)     Hence, tan y=1/5     so the question would be tan2y which can be expanded and the value of tany should be substtuted and the final answer               would   be 5/122- tan-1(1) + cos-1(1/2) = Pie/4 + 3pie/4 = Pie
```
one year ago
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### Course Features

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