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Question 1
If , where , then the value of cos4 θ – sin4θ is
Question 2
The value of
cos 1 º cos 2 º cos 3 º ……..cos 177 º cos 178 º cos 179 º is :
cos 1 º cos 2 º cos 3 º ……..cos 177 º cos 178 º cos 179 º is :
Question 3
If x sin 60 °tan 30 ° = sec 60 °. Cot 45 °, then the value of x is
Question 4
If , then the value
of is
of is
Question 5
If sinθ + cosec θ = 2 then the value of sin5θ + cosec5θ is
Question 6
If then the value of is
Question 7
From the top of a cliff 90 m high, the angles of depression of the top and bottom of a tower are observed to be 30 º and 60 º respectively. What is the height of the tower?
Question 8
A person standing on the bank of river observes that the angle of elevation of the top of tree standing on the opposite bank is 60 º. When he was 40 m away from the bank, he finds that the angle of elevation to be 30 º. What is the height of the tree?
Question 9
If θ be a positive cute angle satisfying then the value of is
Question 10
If then the value of (x + y) is
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Sep 2SSC & Railway