Question

Prove that: cos 27°.tan 27°.tan 63°.cosec 63°= 1​

Answer 1

Value of sin63° cos27° + cos63°sin27°= 1

Step-by-step explanation:

Value of sin63° cos27° + cos63°sin27°

= sin( 63°+27°)

/* Since , SinA cosB + sinB cosA = sin(A+B) */

= sin 90°

= 1