Question

10sec^2 A – 10tan^2A is equal to
A) 1
B) 9
C) 10
D) -10​

Answer 1

Answer:

Correct answer is option C) 10

Step-by-step explanation:

Given

$\: \: \sf \: 10 {sec}^{2} A- 10 {tan}^{2}A \\ \sf \: = 10( {sec}^{2} A - {tan}^{2} A) \\ \\ \sf \: \because \orange{ {sec}^{2} A- {tan}^{2}A = 1} \: \: \: \: so \: \\ \\ = 10 \times\orange{ 1} \\ = 10$