Question

Sin28 cos42+ cos28 cos48

Answer 1

Answer:

0.94

Step-by-step explanation:

sin28cos42+cos28cos(90-48)

sin28cos42+cos28sin42

sin(28+42)

sin70

0.94

Answer 2

Answer:

1

Step-by-step explanation:

sin 48°cos42°+cos28°cos48°

sin48 sin(90-48)+cos48 sin(90-48)

sin48 sin48+cos 48 cos48

sin^248+cos^248

=1