((cos×cos)67-(sin×sin)23) find its value
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(cos²67) - (sin²23)
(cos²67) - (cos²67). cos y= sin (90-y)
0.
hope it helps.
please mark this as brainliest answer.
(cos²67) - (cos²67). cos y= sin (90-y)
0.
hope it helps.
please mark this as brainliest answer.
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