96.3k views
1 vote
Let sin t = a, cos t = b, and tan t = c. Write the following expression in terms of a, b, and c.

sin (t + 4pi) - cos (t + 8pi) + tan (t + 5pi)

User Samtherock
by
7.4k points

1 Answer

4 votes
we use the trigonometric identities in this problem.

=(sin(t)cos(4π)+sin(4π)cos(t))−(cos(t)cos(8π)−sin(t)sin(8π)) +tan(t)+tan(5π)/1−tan(t)tan(5π)
=sin(t)+0−cos(t)+0+ tan(t)1−0=sin(t)−cos(t)+tan(t)
=
a−b+c
User Kai Hudalla
by
7.2k points
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories