Need help on these problems please

S

Soracyn11

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These are challenging please help me.
 

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Yes, they are challenging. But submitting 15 problems with no work shown, and no information about where you need help, is totally inappropriate.

Please read the Read Before Posting page, and then follow it.

The best thing to do is to submit these one or two at a time (two only if they are closely related), showing what you have tried and where you are stuck. Then we can help you at the points where you need help.
 
Here is some of the work I have so far.
 

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You are trying to prove this:

1583433972606.png

(You really should not repeat "[MATH]=3\frac{1}{3}[/MATH]" at the end of every line, which makes it look as if you have succeeded.)

This is not a true statement; I think you have miscopied it. Is the first term meant to be squared? What else is wrong?

It might help if you showed us an image of the problem as given to you, rather than a hand copy.
 
The second problem, too, seems to be wrong:

1583444905725.png

The third is not hard:

1583444954086.png

For that, I would start on the RHS and express everything in terms of sin and cos.
 
Soracyn11 said:
Okay I tried that what should I do next I got stuck again..
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Whom are you answering? What is it that you tried? We need to see actual work in order to know why you are stuck.

But most important, can you show us correct problems? If the first two are nonsense, I don't have much hope that these problems are worth even looking at.
 
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