Question

Simplify these expressions and find their values if x = 3 , a = -1, b = -2.

3x -5 -x +9.​

Answer 1

Step-by-step explanation:

sin 13° cos 17° + sin 77° cos 73° = ..

(a) 1/2

(b) 73/

(c) 1/2

(d) -sin 4°

Answer 2

Step-by-step explanation:

3(3) -5 (-3)multiply 9

9-+8+9=27

27/3

=9.