[2(x+10)] =
well we have to add first
x=1 + 10= 11 since there is parenthesis around the "11" it is times 11 x 2 = 22
we will just have to times this and put a - in front of the 90 (3x - 30) = -90
Hope I could help out.
Answer:
Step-by-step explanation:
2 cos(A+45)cos (B-45)
=2[cos A cos 45-sin A sin 45][cos B cos 45+sin B sin 45]
=2[cos A ×1/√2-sin A ×1/√2][cos B×1/√2+sin B×1/√2]
=2[1/√2(cos A-sin A)][1/√2(cos B-sin B]
=2×1/√2×1/√2 (cos A-sin A)(cos B+sin B)
=cosA cos B+cos A sin B-sin A cos B-sin A sin B
=cos A cos B-sin A sin B-(sin A cos B-cos A sin B)
=cos (A+B)-sin (A-B)
i think there should be A in place of B.
then
=cos (A+A)-sin (A-A)
=cos 2A-sin 0
=cos 2A
as sin 0=0
Answer: 6mm
Step-by-step explanation: It is an equilateral triangle so all equal length so 18/3 sides equal to 6mm
Answer:
D. 211
Step-by-step explanation:
180-19=161
161+50=211
19+(211(x)-50)=180
Answer:
It’s the last option; 10/24 and 20/24
