Question

(1+cot a + tan a)(sin a-cos a)=sec^3-cosec^3/sec^2.cosec^2

Answer 1

Answer:

sin^{2}\theta + cos^{2}\theta=1

So,

cosec\theta\sqrt{1-cos^{2}\theta}=cosec\theta\sqrt{sin^{2}\theta}

= =cosec\theta \;sin\theta

= =\frac{1}{sin\theta}\;sin\theta

= 1

Step-by-step explanation: