Question

please help me in this question

Answer 1

Sin 25/sec 65 + cos 25/cosec 65"

Cos (90 - 25) /sec 65 + sin (90-25)/cosec 65

Cos 65/sec 65 + sin 65/ cosec 65

Cos 65/ 1/cos 65 + sin 65/1/sin 65

Cos 65*cos 65+ sin 65*sin 65

${cos }^{2} 65 \: + {sin}^{2} 65$
=1

I HOPE IT HELPS YOU!