Complete the Identity: Trigonometry (ISC 12)

Exercise and reference answers

Missing parts

1. Answer

   cos^2 x

   Choices

   1. cos^2 x
   2. tan^2 x
   3. sec^2 x

2. Answer

   cos x

   Choices

   1. cos x
   2. tan x
   3. cot x

3. Answer

   cos x

   Choices

   1. cos x
   2. sin x
   3. sec x

Complete the statement

sin^2 x + {0} = 1. Also sin 2x = 2 sin x {1}. And tan x = sin x / {2}.

Instructions

Pick the term that fills each blank.