Prove that: (i) If cos x=−35 and x lies in the IIIrd quadrant, find

1.	Prove that: (i) If cos x=−35 and x lies in the IIIrd quadrant, find the values of cos x2, sin x2 and sin 2x. (ii) If cos x=−35 and x lies in the IInd quadrant, find the values of sin 2x and sin x2
Answer» Prove that: (i) If $c o s x = - \frac{3}{5}$ and x lies in the IIIrd quadrant, find the values of $c o s \frac{x}{2}, s i n \frac{x}{2}$ and sin 2x. (ii) If $c o s x = - \frac{3}{5}$ and x lies in the IInd quadrant, find the values of sin 2x and sin $\frac{x}{2}$

Prove that: (i) If cos x=−35 and x lies in the IIIrd quadrant, find the values of cos x2, sin x2 and sin 2x. (ii) If cos x=−35 and x lies in the IInd quadrant, find the values of sin 2x and sin x2

Answer»

Prove that:

(i) If $c o s x = - \frac{3}{5}$ and x lies in the IIIrd quadrant, find the values of $c o s \frac{x}{2}, s i n \frac{x}{2}$ and sin 2x.

(ii) If $c o s x = - \frac{3}{5}$ and x lies in the IInd quadrant, find the values of sin 2x and sin $\frac{x}{2}$