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```
prove that cotx – 2cot2x = tanx prove that tanA =1/2 and tanB = 1/3 then find aA+B find x in cosecx = 1 + cotx prove the sine rule (sinA)/a +(sinB)/b + (sinC)/c = 2R
prove that cotx – 2cot2x = tanx	prove that tanA =1/2 and tanB = 1/3 then find aA+B	find x in cosecx = 1 + cotx	prove the sine rule (sinA)/a +(sinB)/b + (sinC)/c = 2R

```
11 months ago

Saurabh Koranglekar
10341 Points
```							Dear student3.1= sin x + cosxSin x = 1x = 90°Regards
```
11 months ago
Vikas TU
14149 Points
```							Dear student tan 2x = 2 tanx / (1 - tan²x)  we have solution of Q 2   cotx - 2 cot 2x  = 1/tanx - 2 / tan 2x  = 1/tanx - 2(1 - tan²x)/2 tan x  = 1/tanx - (1 - tan²x)/tanx  = [1 - (1 - tan²x)] / tanx  = tan²x / tanx  = tanxPlease ask single question in a thread.
```
11 months ago
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### Course Features

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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