Answer:
1 = (sin^2 A + cos^2 A)^2 = sin^4 A + cos^4 A + 2 sin^2 A cos^2 A
so
sin^4 A + cos^4 A
= 1 - 1/2 sin^2 2A
= 1 - 1/4 (1- cos 4A)
= 1/4 (3+cos 4A)
Step-by-step explanation:
hope I helped
The period of a sine and cosine is 2pi. The amplitude is 1.
Answer:
you are right, 36°
Step-by-step explanation:
angles add up to 180
Answer:
-3/4
Step-by-step explanation:
-5/4 + 2/4 = -3/4
Hope this helps :)
Answer:
3. 7.2
4. 20
Step-by-step explanation: