Question

pls help me with this qs in maths trigonometry class 11​

Answer 1

Answer:

= Cos(x)

Step-by-step explanation:

= cos[ (n+2)x - (n+1)x]

= cosx

Answer 2

Answer:

$\huge\bold\red{ANSWER}$

Step-by-step explanation:

$\large{\underline{\rm{\red{SOLUTION :}}}}$

$\implies \sf \pink {Taking\:sinx\:and\:cosx\:as \:common\:we\:get}\\ \implies \sf \pink {sinx[(n+1)(n+2)]+cosx[(n+1)(n+2)]}\\ \implies \sf \pink {sinx[n^2+2n+n+2]+cosx[n^2+2n+n+2]}\\ \implies \sf \pink {[n^2+3n+2](sinx+cosx)$