- One of the most important question of NCERT of class 10 Based on Trignonetry Chapter for CBSE BOARD. If Sin A = 3/4, Calculate cos A and tan A.
If Sin A = 3/4, Calculate cos A and tan A.
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Let p=3k and h=4k
Now By Pythagoras theorem p2 + b2 =h2
9k2 + b2 =16k2
b2 = 7k2