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lukranit [14]
3 years ago
15

15. Simplify sin(90° - O) cos 0 - sin(180° +0) sin e.​

Mathematics
1 answer:
dalvyx [7]3 years ago
4 0

Answer:  cos²(θ) + sin(θ)sin(e)

<u>Step-by-step explanation:</u>

sin (90° - θ)cos(Ф) - sin(180° + θ) sin(e)

Note the following identities:

sin (90° - θ) = cos(x)

sin (180° + θ) = -sin(x)

Substitute those identities into the expression:

   cos(x)cos(x)  -  -sin(x)sin(e)

=  cos²(x) + sin(x)sin(e)

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