Question

prove that cos(3π/4 +x) - Cos(3π/4-x) = - root 2 sinn

Answer 1

Hey mate !!

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Answer 2

Answer:

Answer

cos(

4

3π

+x)−cos(

4

3π

−x)

=cos

4

3π

cosx−sin

4

3π

sinx−cos

4

3π

cosx−sin

4

3π

sinx

=−2sin

4

3π

sinx

=−2(−sin

4

π

)sinx

=

2

sinx

Step-by-step explanation:

refer to the attachment for best understanding...