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timofeeve [1]
3 years ago
10

Prove sinxsin2x+cosxcos2x=cosx

Mathematics
1 answer:
Rom4ik [11]3 years ago
6 0
Prove sinxsin2x+cosxcos2x=cosx

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PLZ HELP ILL MARK U BRAINLIEST!!!
lidiya [134]

Answer:

x=18

Step-by-step explanation:

7x-1=125

<u>  +1    +1</u>

<u>7x</u>=<u>126</u>

7      7

X=18

3 0
3 years ago
The pair of triangles that are congruent by the ASA criterion is . The pair of triangles that are congruent by the SAS criterion
anzhelika [568]

Answer:

The pair of triangles that are congruent by the ASA criterion isΔ ABC and Δ XYZ.

The pair of triangles that are congruent by the SAS criterion is Δ BAC and ΔRQP.


Step-by-step explanation:

Two triangles are congruent by ASA property if any two angles and their included side are equal in both triangles .In triangles Δ ABC and Δ XYZ the equal side 5 is between the two equal angles. So these triangles are congruent by ASA criterion.

Two triangles are congruent by SAS if  two sides and the included angle of one triangle are congruent to two sides and the included angle of another triangle .In triangles  Δ BAC and ΔRQP. the included angles A and Q are equal and hence the triangles are congruent by SAS criterion.

5 0
3 years ago
Read 2 more answers
In the Diagram, DEC is a ____ of ABC across line k.
IRISSAK [1]

Answer:

Reflection

Step-by-step explanation:

A reflection is a mirrored image of a shape.  Notice how DEC seems to be a "flipped" version of ABC, hence a mirrored image.

Cheers.

5 0
3 years ago
Similar polygons have corresponding sides that are proportional and corresponding angles that are -
Scorpion4ik [409]
A. congruent

hope this helped <33
6 0
3 years ago
How many possible outfit combinations come from 10 shirts, two slacks, and five ties? A.  17B.  25C.  100D.  20 
Scilla [17]
<span>100.  Since 10 shirts x 2 slacks means 20 combos with one tie and 100 with 5 ties</span>
7 0
3 years ago
Read 2 more answers
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