4 cot 45° - 5 sec^2 60° + sin 30°
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2
Step-by-step explanation:
your answer in attachment
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Answered by
1
Answer:
-31/2
Step-by-step Explanation:
4 cot 45° - 5 sec^2 60° + sin 30°
cot 45° = 1
sec 60° = 2
sin 30° = 1/2
= 4(1) - 5(2)^2 + 1/2
= 4 - 5(4) + 1/2
= 4 - 20 +1/2
= -16 + 1/2 ( LCM = 2 )
= -16×2/2 + 1/2
= -32/2 + 1/2
= -31/2 is the answer.
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