1.

0T W) + 408 WAZ = (0 सैर शक

Answer»

According to the trigonometric identity,

tan70 = tan(20+50)tan70 = (tan20+tan50)/ 1-tan20tan50tan70 - tan20tan50tan70 = tan20 + tan50

Also, tan70tan20 = tan70cot70 = 1

Hence, tan70 - tan50 = tan20 + tan50

Therefore, tan70 = tan20 + 2tan50



Discussion

No Comment Found