Question

Prove that sin 10+ cos 60√2 tan 45 = cosec 20. sec 90

Answer 1

Solution:

To prove: sin 10 +cos60√2tan45 = cosec 20.sec 90

Proof:   sin 10 +(1/2)√2(1)=cosec 20.(1/cos 90)
          = sin 10 + (√2/2)=cosec 20.(1/0)
          = sin 10+ 1/√2=sec(90-20)(undefined)
                  Un- defined values ,.