SOLUTION: Given that Sin theta = -3/5 , 3pi/2 , theta , 2pi, Find: Sin20 Cos20 Tan20

Question 1075182: Given that Sin theta = -3/5 , 3pi/2 , theta , 2pi,
Find:
Sin20
Cos20
Tan20
Answer by ikleyn(52879) (Show Source): You can put this solution on YOUR website!
.
Given that Sin theta = -3/5 , 3pi/2 <= theta < 2pi,
Find:
Sin20
Cos20
Tan20
~~~~~~~~~~~~~~~~~~

0.   =  =  =  =  = .

    The sign is "+", since cosine is positive in QIV.


1.   =  =  = .


2.   =  =  =  = .


        ( In particular,  lies in QIV ).


3.  Having this, can you calculate  on your own ?

For many other similar solved problems see the lessons
    - Calculating trigonometric functions of angles
    - Advanced problems on calculating trigonometric functions of angles
in this site.

Also, you have this free of charge online textbook in ALGEBRA-II in this site
    - ALGEBRA-II - YOUR ONLINE TEXTBOOK.

The referred lessons are the part of this online textbook under the topic "Trigonometry: Solved problems".

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