125k views
3 votes
Giải phương trình lượng giác sau
sin2x+cos2x+sin4x=1

User Mrzasa
by
8.8k points

1 Answer

3 votes

Answer:

2

Explanation:

Given, cosx+cos

2

x=1

⇒cosx=1−cos

2

x

⇒cosx=sin

2

x

Squaring both sides we get

⇒cos

2

x=sin

4

x .....(1)

⇒sin

4

x−cos

2

x=0

Adding both side 1, we get

⇒sin

4

x+1−cos

2

x=1

∴sin

2

x+sin

4

x=1 Proved.

User Mehedi Abdullah
by
7.5k points

Related questions

asked Apr 18, 2022 147k views
Shiquana asked Apr 18, 2022
by Shiquana
8.7k points
1 answer
0 votes
147k views
asked May 18, 2022 23.7k views
Mark Cameron asked May 18, 2022
by Mark Cameron
8.2k points
1 answer
0 votes
23.7k views
asked Aug 26, 2022 5.2k views
Fatih asked Aug 26, 2022
by Fatih
7.6k points
1 answer
5 votes
5.2k views
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories