Question

Evaluate sin42-cos48

Answer 1

sin42-cos48=0

See the explanation in the pic

Answer 2

Answer:

0

Step-by-step explanation:

We will use the following rule of complementary to solve this question.

sin A = cos ( 90° - A )

In this question,

A = 42, B = 48

sin 48° - cos 42°

cos ( 90° - 48° ) - cos 42°

cos 42° - cos 42°

0