Question

express cos 74 + sec 83 in terms of angles between 0 and 45

Answer 1

As we know that

costheta=sin(90-theta)

then,Cos74= sin(90-74)

cos74=sin16

Also,sec is change to cosec

sec83=cosec17

Then,

Cos74+Sec83

=Sin16+cosec17(This equation in terms of angle b/w 0 and 45 degrees.