You must be logged in to see worked solutions.

Already have an account? Log in here.

These are your basic building blocks for solving trigonometric equations and understanding how the pieces fit together. Using these identities can make sense of even the scariest looking trig.

If \( \tan \theta = \frac{ 2}{7} \), what is the value of

\[ \frac{ \cos \theta + 3 \sin \theta } { \cos \theta - 3 \sin \theta}? \]

**Details and assumptions**

You may read up on Trigonometric Functions.

You must be logged in to see worked solutions.

Already have an account? Log in here.

You must be logged in to see worked solutions.

Already have an account? Log in here.

If

\[ \sum_{i=0} ^ {90} \cos ^2 i ^ \circ = \frac {a}{b}, \]

where \(a\) and \(b\) are positive coprime integers what is the value of \(a+b\)?

You must be logged in to see worked solutions.

Already have an account? Log in here.

You must be logged in to see worked solutions.

Already have an account? Log in here.

What is the value of:

\( \left(1-\frac{1}{\cos 72 ^\circ}\right)\left(1+\frac{1}{\sin 18 ^\circ}\right)\left(1-\frac{1}{\sin 72 ^\circ}\right)\left(1+\frac{1}{\cos 18 ^\circ}\right)? \)

You must be logged in to see worked solutions.

Already have an account? Log in here.

×

Problem Loading...

Note Loading...

Set Loading...