Asked by OwamIII

1 .If tanA=1/3 and tanB=1/7 (both A and B are acute),calculate 50sin(2A +B)
2.1Prove that sin2A+2cosA-2cos^3A/1+sinA =sin2A
2.2 for which values of A in the interval[-360;360] is the identity in 2.1 undefined?
3.If tanB=3/4 , 0<B<90 , prove that 4cos2B+3sin2B=4
4.Prove that (1/cos^2B)cos2B=2-1/cos^2B)
5. Write sin2A and cos2A in terms of sinA and cosA

Answers

Answered by Reiny
see solution above of the same question
Please don't switch names.
There are no AI answers yet. The ability to request AI answers is coming soon!

Related Questions