Question

Express each of the following in the terms of angle between 0° and 45°
1) cos 74° + sec 67°​

Answer 1

Answer:

Step-by-step explanation:

Cos74 + sec 67

we can write

cos 74 as cos (90 - 16)

sec 67 as sec (90 - 23)

so if we write the equation

cos (90 - 16) + sec (90 - 23)

Sin 16 + cosec 23        [ here as we know that Cos (90 - theta ) = sin theta

                                                    Sec ( 90 - theta) = cosec theta ]