coollid876
23.07.2020 •
Mathematics
A very simple question for trigonometry! So lets say I want to use a formula for example csc = 1/sin a. Would that still apply if instead of sin a it is - sin a? If not, can I still use this formula is sin a is negative? Thanks!
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Ответ:
Step-by-step explanation:
csc = 1/sin a would be OK if you'd insert the argument 'a:'
csc a = 1/sin a is an identity (a relationship that is always true).
If you write csc a = 1 / (-sin a) you are creating a conditional equation which may be true for some values of a but not for all.
Ответ: