Question

23.
Prove that: tan 70 = 2 tan 50€ + tan 20%
If 1 + i and 1 i are the roots of the equation x² + ax + b = 0,
where a, b e R, then find the values of a and b
The 5thstand the terms of
22​

Answer 1

Answer:

$\huge\fcolorbox{black}{aqua}{Solution:-}$

Heya,..

cosA=1/2..

cosA=cos60°

A=60°

and again.SinB=1/√2

sinB=sin45°

B=45°

,now ,tanA-tanB/1+tanA*tanB=Tan(A-B)

tan(60°-45°)

tan15°=√3-1/√3+1 Ans

hope it help you.

Answer 2

Step-by-step explanation:

[tex]cosA=1/2..

cosA=cos60°

A=60°

and again.SinB=1/√2

sinB=sin45°

B=45°

,now ,tanA-tanB/1+tanA*tanB=Tan(A-B)

tan(60°-45°)

tan15°=√3-1/√3+1 Ans

hope it help you.[\tex]