Ra S.
asked • 02/15/21Question is in the description. it was too long to put in the title.
Using a double-angle or half-angle formula to simplify the given expressions.
(a) If cos2(23∘)−sin2(23∘)=cos(A∘) then
A= degrees
(b) If 2sin(7x)cos(7x)=sin(B∘) then
B= .
More
1 Expert Answer
Mark M. answered • 02/15/21
Tutor
5.0
(278)
Mathematics Teacher - NCLB Highly Qualified
(b)
2 sin (7x) cos (7x) = sin B
sin (7x) cos (7x) + cos (7x) sin (7x) = sin B
sin (7x + 7x) = sin B
14x = B
Still looking for help? Get the right answer, fast.
Ask a question for free
Get a free answer to a quick problem.
Most questions answered within 4 hours.
OR
Find an Online Tutor Now
Choose an expert and meet online. No packages or subscriptions, pay only for the time you need.
Mark M.
In (a) are the functions squared?02/15/21