Sum Or Difference Of Two Angles Formula Sheet Page 3
ADVERTISEMENT
1
2
3
4
5
6Example (continued): Find the exact value of each expression.
5
7
5
7
cos
cos
sin
sin
b)
12
12
12
12
Because the sines and cosines are Grouped together, we know this is the expansion of a ________________
function. Completing the final letter of our "CGO" guide, we know that the condensed function will use the
_____________________ sign as the expanded one, so the condensed function will be: __________________
Now find the exact value of this trig function.
Now let's learn the sum and difference formulas for tangent:
Notice that the numerator has the same sign as the original
function and the denominator has the opposite sign. You do
not have to memorize the sum/difference formulas for
tangent because they are not used as frequently as the sine
and cosine formulas.
Example: Find the exact value of each expression.
5
tan
tan
a)
=
12
19
tan
b)
This angle is in Quadrant _______. Tangent is ___________________ in this quadrant. What is
12
the reference angle? ____________ So this is actually the same as _____________________________________.
Now rewrite this angle as a sum or difference of two angles and find the exact value.
Page | 3
ADVERTISEMENT
0 votes
Related Articles
Related forms
Related Categories
Parent category: Education