Question:
What is tan a equal to?
What is tan a equal to?
Options:
- a) 1 2
- b) 1
- c) 3 4
- d) 2
- a) 1 2
- b) 1
- c) 3 4
- d) 2
correct answer : c)
Explanation:
cos a = 2(1 – sin a)
Þ co s
(s in )
2
21
α
α –
= 4
1
1
+
–
sin
sin
α
α
= 4
1
Þ
sin a = 3
5
tan a = 3
25 9-
= 3
4
cos a = 2(1 – sin a)
Þ co s
(s in )
2
21
α
α –
= 4
1
1
+
–
sin
sin
α
α
= 4
1
Þ
sin a = 3
5
tan a = 3
25 9-
= 3
4