Question

sin(30 +@) + cos(60+@) = cos@​

Answer 1

Answer:

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Step-by-step explanation:

sin(30+@+cos(60+@)

sin30.cos@+cos30.sin@[email protected]@

1/2cos@+V3/2sin@+1/2cos @-3/2sin@

1/2cos@+1/2cos@

COs@

prove that