Question

(i) 9 sec square A - 9 tan square A =
(A) 1
(B) 9
(C) 8
(D) O​

Answer 1

$9 \: {sec}^{2} A \: - 9 \: {tan}^{2} A \\ = 9( {sec}^{2} A - {tan}^{2} A) \\ = 9(1) \\ = 9 \\ \\ bcoz \: we \:know \\ {sec}^{2} A - {tan}^{2} A = 1$

Answer 2

anser is 9

explanation

If  

cos  

2

y

cos  

4

x

​  

+  

sin  

2

y

sin  

4

x

​  

=1 then show that  

cos  

2

x

cos  

4

y

​  

+  

sin  

2

x

sin  

4

y

​  

=1.

Study later

View Answer

Value of  

sin  

2

59  

o

+sin  

2

31  

o

 

cos  

2

20  

o

+cos  

2

70  

o

 

​