Question

Find the value of the following equation____
*sin135º cos145° + cos135º sin145°
solve fast .. please ​

Answer 1

Answer:

Explanation:

sin(A+B) = sinA cosB + cosA sin B

here

given expression is equal to sin ( 135 + 145 ) = sin 280

                                                                          = sin ( 270 + 10 )

                                                                          = - cos 10

                                                                          = 0.9848

P.S. : you could've typed it in calculator

Answer 2

Answer:

This looks like :

sinA cosB + cosA sinB = sin (A+B)

sin 135° cos 145° + cos 135° sin 145°

sin (135°+145°)

sin (280°)

sin ( 360°-80°)

- sin 80°

Hope it helps you.

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