Question

(iii) sin-B + cos²B
(iv) sin B.cos C + cos B.sin C
2. From
y ngure, find the values of:
tan C
(i) cos B
А
8
B.
С
11
17​

Answer 1

First question answer is :

Sin(-B) +Cos²B

(-AC/BC) + (AB/BC) ²

(-AC/BC) + (AB²/BC²)

-AC²+AB²/BC²

-BC²/BC²

= -1

Second question answer :

SinB. CosC + CosB. SinC

(AC/BC) × AB/AC + (AB/BC) × BC/AC

AB/BC + AB/AC

Third question answer :

I can't understand this question...

Sorry