Trigonometrical Ratios of Standard Angles [Including Evaluation of an Expression Involving Trigonometric Ratios] — MATHEMATICS STD 9 — Question
ICSE BoardEnglish MediumSTD 9MATHEMATICSTrigonometrical Ratios of Standard Angles [Including Evaluation of an Expression Involving Trigonometric Ratios]2 Marks
Question
Solve the following equation for$ A,$ if $\sec 2A = 2$
✓
Answer
According to the question,
We have,
$\sec 2A = 2$
$\sec 2A = \sec 60^\circ$
$2A = 60^\circ$
$A = 30^\circ .$
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.