a. If cosθ=−45 where θ is in quadrant 3, find sin2θ. b. If cosθ=2√2 where θ is in quadrant 1, find cos2θ. c. If sinθ=817 where θ
is in quadrant 2, find tan2θ.
1 answer:
Answer:
Part A)
Part B)
Part C)
Step-by-step explanation:
Part A) we have
θ is in quadrant 3 ----> the sine is negative
Find
we know that
Remember that
substitute
---> remember that the sine is negative (3 quadrant)
Find
we have
substitute
Part B) we have
θ is in quadrant 1
Find
we know that
substitute
Part C) we have
θ is in quadrant 2 ----> the cosine is negative
Find
we know that
Remember that
substitute
Find
substitute
Find
substitute
You might be interested in
Answer:
-78.12
Step-by-step explanation:
Answer:
X=5 Y=5
Step-by-step explanation:
Answer:
27 inches hopes this helps
Step-by-step explanation:
please make me brainliest
Answer: 8%
Step-by-step explanation:
the answer is 7.5% but you said its a whole number so i guess its 8%
Let x represent the total number of pupils: (1/3)x = 12
Multiply both sides by 3: x = 36
Total number of pupils is 36
1 pupil out of 36 pupils = 1/36
Answer: 1/36