Answer:
(a) 
(b) 
(c) 
Step-by-step explanation:
Given that 90°< θ<180° and 
Since 90°< θ<180° so θ lies in second quadrant where sinθ is positive but cosθ is negative.
(a) The identity,
Sin²θ+cos²θ= 1
⇒cos²θ=1-sin²θ
(b)
[ Since the quadrant is not considered]
(c)
[ since cos θ is negative in second quadrant]
Answer:
16. 216 square inches
18. 252 square cm
Step-by-step explanation:
16. The figure can be decomposed into a 12×17 rectangle and a triangle with base 16-12=4 and height 17-11=6.
Then the area is ...
rectangle area = 12×17 = 204
triangle area = (1/2)(4×6) = 12
total area = rectangle area + triangle area = 204 +12 = 216 . . . square inches
__
18. The figure can be decomposed into a 12×12 square and a 18×6 rectangle. Then the total area is ...
area = 12×12 + 18×6 = 252 . . . square cm
They are asking how to rewrite the equation with it as x= what ever comes after
example 4*x=20 so x= 20/4
The two angles are supplementary.
6x + 4 + 10x = 180
16x + 4 = 180
16x = 176
x = 11
Hope this helps :)
Answer:
432
Step-by-step explanation:
V=length×width×height
= 8×6=48
=48×9=432
