Question

14. Evaluate: cos 48° -sin 42°​

Answer 1

Answer:

Step-by-step explanation:

Answer

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Answer 2

Answer:

The value of cos⁡[48°] - sin⁡[42°] is 0

Step-by-step explanation:

Step 1:

To Calculate the Value of   cos⁡(48°) - sin42°

Step 2:

We know that cosθ = sin(90-θ)

Now look at the question.

Step 3:  

cos⁡(48°) - sin⁡(42°)  

cos⁡(48°) - sin⁡(42°) = cos(90°-42°) - sin42°(As per Step 2)

cos⁡(48°) - sin⁡(42°) = cos(42°) -sin 42°

Step 4:

We know the value of cos(42°) which is Zero.

Also the value of sin 42° which is Zero. Substitute the value in step 4.

Step 5:

= sin 42° - sin 42°

=  0-0

=0

i.e., cos⁡[48°] - sin⁡[42°] = 0

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