ccj2609 ccj2609
  • 01-09-2019
  • Mathematics
contestada

cos²x - 2 sin²x = -2 .Help me to solve it ​

Respuesta :

kosala1478
kosala1478 kosala1478
  • 01-09-2019

Step-by-step explanation:

note that

sin²x = (1-cos²x)

LHS= cos²x - 2 sin²x

= cos²x - 2(1-cos²x)

= cos²x - 2 + 2cos²x

= 3cos²x - 2

or

cos²x = (1-sin²x)

LHS= cos²x - 2 sin²x

=1-sin²x - 2 sin²x

= 1-3sin²x

Answer Link

Otras preguntas

Hello can someone help me with this? 6= a/4 +2
What benefits Germany's trade and economy? A) Command Economy B) Permafrost C) Rhine River D) The Prime Minister
Describe how humans might be contributing to a higher extinction rate than was seen in the past.
how many syllables dose flute have
help please!!! A function has the function rule y = -7x - 2. If the input is -4, what is the output?
If a body is warm to the touch and without rigor, what can you deduce about the time of death?
Karagdagang GawainGawain: Ninuno Ko, Gagayahin koMaghanap ng isang piraso ng bato Gamitin mo ito sa ilang mga gawain sa bahaytulad ng pagpukpok ng pako at iba.
What is the purpose of feeling pain?​
a sweater cost $2 to make. a store marks up the price 600%, then sell it to customers. how much will a customer pays for the sweater ​
Which statement about this list is most likely true?