A railway train is moving on a circular curve of radius 1500 m at a speed of 90 km/hr. Through what angle has it turned is 11 seconds?
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A tower of x meters high has a flagstaff at its top. The tower and the flagstaff subtend equal angles at a point distant y meters from the foot of the tower then the length of the flagstaff in meters is
In a ΔABC,cosA=53 and cosB=135. The value of cosC can be
If tanA−tanB=x,cotB−cotA=y and(sec(A−B)−1)(sec(A−B)+1)= (x+y)cxayb, then find the value of a+b+c.
If A+B=45o, prove that (cotA−1)(cotB−1)=2
Write the complementary angle of 31 of 180o.
Maximum value of sinα+sinβ+2 whwre α+β=120o & α,β∈(0,2π) is-
Prove that tan(x−y)=1+tanxtanytanx−tany
If A and B are positive acute angle satisfying the equation 3cos2A+2cos2B=4 and sinB 3sinA =cosA 2cosB , then A+2B is