Fermi
·
Concept Library
·
Courses
·
Books
·
Problems
·
Simulations
·
Math Wiki
·
High School
Fermi
›
Problems
Mathematics
Mathematics
Problem
For
0
∘
<
θ
<
90
∘
0^\circ<\theta<90^\circ
0
∘
<
θ
<
9
0
∘
, the expression
1
−
sin
2
θ
1
+
tan
2
θ
\dfrac{1-\sin^2\theta}{1+\tan^2\theta}
1
+
tan
2
θ
1
−
sin
2
θ
simplifies to a) 1 b)
cos
4
θ
\cos^4\theta
cos
4
θ
c)
sin
2
θ
\sin^2\theta
sin
2
θ
d)
cos
2
θ
\cos^2\theta
cos
2
θ
Browse the problem library