Question

pls advise me how to be good in these questions​

Answer 1

It is all upon ur knowledge about the identities and formulas the trigonometric table

try to solve more and more questions to become a master in this questions

Refer the above attachment fir proof

Hope this helps

Mark as brainliest

Answer 2

Answer:

i hope it will help you

please mark it as brainliest

actually you need to mention is to prove or to solve since both have different meanings