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solve the equation sin6x + cos4x + 2 = 0 ,find all the solutions of the equation sinx + (sin 180/8) sqrt of (squre of 1- cosx + squre of sinx )

```
one year ago

Arun
25089 Points
```							Dear student it can be written as 3 sin2x – 4 sin^3 2x – 2 sin^2 2x + 3 = 0 now this is cubic in sin 2x on factorisation we get that sin 2x = 1 is only factor hence sin 2x = 12x = (4n+1)pi/2x = (4n+1)pi/4
```
one year ago
Saurabh Koranglekar
10233 Points
```							Dear studentExpand sin 6 x as 3 ( theta)Expand cos 4x as 2( theta) specifically in sine termConsider sin 2x as some variable mSolve for cubic eqn m and substitute m as originally considered sin 2xSimplify to get final solutionKindly refrain from asking multiple questions in one threadThanks and regards
```
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