Math, asked by nathanialbamon, 2 months ago

11.
11. Find the value of x (0°<x<90°) in
tan 3x = sin 45ºcos 45º+sin 30​

Answers

Answered by ilmashaikh861
0

Step-by-step explanation:

R.H.S

sin45⋅cos45

o

+sin30

=

2

1

.

2

1

+

2

1

=

2

1

+

2

1

=

2

2

=1

Now,

L.H.S

tan3x=1

But tan45

o

=1

∴tan3x=tan45

⇒3x=45

⇒x=

3

45

∴x=15

Answered by smitharavindranath31
3

tan 3x = sin 45° cos 45° + sin 30°

⇒ tan 3x = 1/√2 × 1/√2 + 1/2

⇒ tan 3x = 1/2 + 1/2

⇒ tan 3x = 1

⇒ tan 3x = tan 45°

⇒ 3x = 45°

⇒ x = 15°

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