Question

please tell me the answer please,,,​

Answer 1

Answer:

2nd :-

Here...tan60/sin60 + cos60

=> (√3)/(√3/2+1/2)

As we know that tan60 = √3, sin60 = √3/2 & cos60 = 1/2.

=> (√3)/(√3+1)/2

=>2√3/√3+1

On rationalization.

=> (2√3/√3+1).(√3–1/√3–1)

=> (2√3)(√3–1)/(√3+1)(√3–1)

=> (6–2√3)/(√3²–1²)

Because a²–b² = (a+b)(a-b)

=> (6–2√3)/2

=>3–√3 «««««Ans.

3rd :- Correct option is

D

x=2

The graph represents a line that is parallel to the y-axis and passes through the point (2,1) is x=2.

4th :- side BC∥ side AD

Interior angles on the same side of the transversal are supplementary.

∠A+∠B=180∘

⇒72∘+∠B=180∘

⇒∠B=180∘−72∘

⇒∠B=108∘

Construction:

Draw BP ∥⊂D

So,BC∥AD and BP∥CD

⇒PBCD is a parallelogram

⇒CD≅BP

Now CD=BP and CD=AB

⇒BP=AB

⇒∠BAP=∠BPA=72∘

BP∥CD so,

∠CDP=∠BPA=72∘(corresponding angles are equal)

∠B=108∘

∠D=72

Answer 2

Answer:

See the attachment mdhla.