Question

T-Ratios of Some Particular Angles
573
|
160
(1 - x?)
(1+x)
600
15. If A=60° and B = 30°, verify that:
(i) sin (A-B)=sin Acos B-cos Asin B
(ii) cos (A-B) = cos Acos B+ sin Asin B
tan Atan B
(iii) tan (A-B)
1+tan Atan B
16. If A and B are acute angles such that tan A==, tan B=
1
3'
2
tan A +tan B
tan (A+B)
show that A+B=45°.
1-tan Atan B
and
E
find the value of tan 60°, it
2 tan A
17. Using the formula, tan 2A=
1-tan?A'
1
being given that tan 30º =
13
0°
0°
1+ cos 2A
find the value of cos 30°, it
18. Using the formula, cos A=
2
1
being given that cos 60° =
2
1- cos 2A
find the value of sin 30°, it
19. Using the formula, sin A=
2
1
being given that cos 60° = =
2​

Answer 1

Answer:

I don't know sorry

Explanation:

I am new in nrainly