Math, asked by Anonymous, 1 year ago

cos(-7π/2) find the value​

Answers

Answered by sailyrocky29143
4

Answer:

You may know that

cos

0

=

1

and

cos

π

=

1

If you keep adding

2

π

to the angle, the value doesn't change

So,

cos

π

+

2

π

=

cos

3

π

is also = - 1. Similarly,

cos

5

π

,

cos

7

π

,

cos

9

π

etc. in general

cos

(

2

n

+

1

)

π

, where n is an integer like 1, 2, 3, etc, are -1

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