Hitunglah nilai dari 1.cosec 300° 2.cotan 135° 3.sin 1050°

Cosec 300 = cosec (360-60) = - cosec 60 = - 1/sin 60 = - 1/(½√3) = - ⅔√3
Cotan 135 = cotan (180-45) = - cotan 45 = - 1/tan 45 = - 1/1 = - 1
sin 1050 = sin (2x360+330) = sin 330 = sin (360-30) = - sin 30 = - ½