evalute
cot²30°+2cos²60°-3/4sec²45°-4sec²30°.
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Answered by
6
(√3)² + 2 (1/2)² - 3/4(√2)² - 4(2/√3)²
= 3 +1/2 - 3/2 - 16/3
= 2 - 16/3 = -10/3
= 3 +1/2 - 3/2 - 16/3
= 2 - 16/3 = -10/3
qais:
is it written - 2cos^2(30)
sorry,but now i am sure and now i am posting the answer u must check
upload with question
ok
your mistake is in calculation,check it again
i have checked
so i have told you to upload question also..because there is a mistake in your question
no the answer is as follows-after 2nd line 18-3-9-32/6=-26/6=-13/3
i am not able to post answer due to network
buddy your question is wrong...in second term it is not + ...actually it is - (minus)
Answered by
4
cot²30° + 2cos²60° - 3/ 4sec²45° - 4sec²30°
Substituting the values
(√3)² + 2(1/2)² - 3/4(√2)² - 4(2/√3)²
= 3 + 1/2 - 3/2 - 16/3
= 18/6 + 3/6 - 9/6 - 32/3
= - 10/3
Substituting the values
(√3)² + 2(1/2)² - 3/4(√2)² - 4(2/√3)²
= 3 + 1/2 - 3/2 - 16/3
= 18/6 + 3/6 - 9/6 - 32/3
= - 10/3
sorry,now i am fully sure i must post the answer you must check
sorry.by mistake i send this to u
hey i want to tell u your answer is wong
Sorry its - 13/6 at last
Calculation mistake
And its (-32/6) in the second last step not (-32/3)
That's all, calculation and writing mistake, all other things are correct.. Keep moving ! :)
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